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Talk to a Mailbox Expert Today - (800) 977-2626
Talk to a Mailbox Expert Today - (800) 977-2626

Florence Mailboxes | USPS Approved Neighborhood Cluster Mailboxes

Florence vs. Salsbury CBUs – What’s the Difference?
Both manufacturers produce USPS-approved Cluster Box Units (CBUs) to identical specifications, using the same materials and paint texture. Parts are even interchangeable.
Why is there a price difference between Florence and Salsbury CBUs?
– Florence: Based in Manhattan, KS.
– Salsbury: Based in Los Angeles, CA, with a 600,000 sq. ft. warehouse.
Same product. Same quality. Same lead times. Just different pricing.

Standard Features:
  • Robotically welded cabinet and hood seams
  • Rugged, weather-resistant powder coat finish resists scratching and vandalism.
  • Constructed of 300 series stainless steel and aircraft aluminum, including an aluminum pedestal
  • Master front-loading door designed to prevent prying with interlocking overlap seams
  • Solid aluminum mail slot frame protects the adjacent customer compartment and collection compartment.
  • Silver adhesive metal placards with black numbers 1-16 and 1P-2P

8 Door Black Postal Products Unlimited F Spec Cluster Box Unit with Pedestal
-20%
Brand: Postal Products Unlimited Product Code: N1031541
Other Colors Available: Please call customer service at 1.800.977.2626. Model Compatibility Identical to Auth-Florence model 1570-8 and Salsbury Industries model 3308. This unit comes complete with tenant locks and a pedestal. Product Ov..
$1,950.00 $2,434.00
Add to Cart Add to Quote
8 Door Dark Bronze Postal Products Unlimited F Spec Cluster Box Unit with Pedestal
-20%
Brand: Postal Products Unlimited Product Code: N1031041
Other Colors Available: Please call customer service at 1.800.977.2626. Model Compatibility Identical to Auth-Florence model 1570-8 and Salsbury Industries model 3308. This unit comes complete with tenant locks and a pedestal. Product Ov..
$1,950.00 $2,434.00
Add to Cart Add to Quote
8 Door Postal Grey Postal Products Unlimited F Spec Cluster Box Unit with Pedestal
-20%
Brand: Postal Products Unlimited Product Code: N1036014
Other Colors Available: Please call customer service at 1.800.977.2626. Model Compatibility Identical to Auth-Florence model 1570-8 and Salsbury Industries model 3308. This unit comes complete with tenant locks and a pedestal. Product Ov..
$1,950.00 $2,434.00
Add to Cart Add to Quote
8 Door Postal Products Unlimited F Spec Cluster Box Unit with Pedestal
-20%
Brand: Postal Products Unlimited Product Code: N1029594
Other Colors Available: Please call customer service at 1.800.977.2626. Model Compatibility Identical to Auth-Florence model 1570-8 and Salsbury Industries model 3308. This unit comes complete with tenant locks and a pedestal. Product Ov..
$1,950.00 $2,434.00
Add to Cart Add to Quote
Salsbury 8 Doors with 2 Parcel Lockers Cluster Box Unit (CBU) Mailbox - 3308
FAST SHIPPING / 1-2 DAYS!
Brand: Salsbury Product Code: 3308
Salsbury 3300 Series Cluster Box Units (CBU's) - USPS AccessSecure Mail & Package Delivery SolutionCluster Box Units (CBU's) manufactured by Salsbury Industries provide USPS access and offer a secure means of receiving mail and packages. They are ideal for commercial use or residential applicati..
$2,700.00
Add to Cart Add to Quote
8 Door Black Florence Cluster Mailbox with Pedestal - 1570-8-BK
DISCOUNT APPLIED AT CHECKOUT!!!
Brand: Florence Product Code: 1570-8-BK
Florence vital™ CBU 1570-8 Cluster Box Unit - USPS Approved Secure Centralized Mail Delivery Solution The Florence vital™ CBU 1570-8 provides a secure, free-standing outdoor mailbox solution for centralized mail delivery in residential and commercial developments. This USPS-approved cluster box un..
$2,434.00
Add to Cart Add to Quote
8 Doors with 2 Parcel Lockers Salsbury Cluster Box Unit (CBU) Mailbox in Black - 3308BLK-U
FAST SHIPPING / 1-2 DAYS!
Brand: Salsbury Product Code: 3308BLK-U
Salsbury 3300 Series Cluster Box Units (CBU's) - USPS AccessSecure Mail & Package Delivery SolutionCluster Box Units (CBU's) manufactured by Salsbury Industries provide USPS access and offer a secure means of receiving mail and packages. They are ideal for commercial use or residential applicati..
$2,700.00
Add to Cart Add to Quote
8 Tenant Door Standard Style CBU Mailbox (Pedestal Included) - Type 1 - 1570-8AF
DISCOUNT APPLIED AT CHECKOUT!!!
Brand: Florence Product Code: 1570-8AF
Florence vital™ CBU 1570-8AF Classic Style Cluster Box Unit - USPS ApprovedSecure Centralized Mail Delivery SolutionThe Florence vital™ CBU 1570-8 provides a secure, free-standing outdoor mailbox solution for centralized mail delivery in residential and commercial developments. This USPS-approv..
$2,434.00
Add to Cart Add to Quote
8 Door Bronze Florence Cluster Mailbox with Pedestal - 1570-8-DB
DISCOUNT APPLIED AT CHECKOUT!!!
Brand: Florence Product Code: 1570-8-DB
Florence vital™ CBU 1570-8-DB USPS Approved Cluster Box UnitSecure Centralized Mail Delivery SolutionFlorence vital™ CBU mailbox and pedestal (included in each mailbox purchase) provides a secure, free standing outdoor solution for your neighborhood centralized mail delivery needs. These high securi..
$2,434.00
Add to Cart Add to Quote
8 Doors with 2 Parcel Lockers Salsbury Cluster Box Unit (CBU) Mailbox in Bronze - 3308BRZ-U
FAST SHIPPING / 1-2 DAYS!
Brand: Salsbury Product Code: 3308BRZ-U
Salsbury 3300 Series Cluster Box Units (CBU's) - USPS AccessSecure Mail & Package Delivery SolutionCluster Box Units (CBU's) manufactured by Salsbury Industries provide USPS access and offer a secure means of receiving mail and packages. They are ideal for commercial use or residential applicati..
$2,700.00
Add to Cart Add to Quote
8 Doors with 2 Parcel Lockers Salsbury Cluster Box Unit (CBU) Mailbox in Green - 3308GRN-U
FAST SHIPPING / 1-2 DAYS!
Brand: Salsbury Product Code: 3308GRN-U
Salsbury 3300 Series Cluster Box Units (CBU's) - USPS AccessSecure Mail & Package Delivery SolutionCluster Box Units (CBU's) manufactured by Salsbury Industries provide USPS access and offer a secure means of receiving mail and packages. They are ideal for commercial use or residential applicati..
$2,700.00
Add to Cart Add to Quote
8 Door Gray Florence Cluster Mailbox with Pedestal - 1570-8-PG
DISCOUNT APPLIED AT CHECKOUT!!!
Brand: Florence Product Code: 1570-8-PG
Florence vital™ CBU 1570-8-PG USPS Approved Cluster Box UnitSecure Centralized Mail Delivery SolutionFlorence vital™ CBU mailbox and pedestal (included in each mailbox purchase) provides a secure, free standing outdoor solution for your neighborhood centralized mail delivery needs. These high sec..
$2,434.00
Add to Cart Add to Quote
8 Doors with 2 Parcel Lockers Salsbury Cluster Box Unit (CBU) Mailbox in Gray - 3308GRY-U
FAST SHIPPING / 1-2 DAYS!
Brand: Salsbury Product Code: 3308GRY-U
Salsbury 3300 Series Cluster Box Units (CBU's) - USPS AccessSecure Mail & Package Delivery SolutionCluster Box Units (CBU's) manufactured by Salsbury Industries provide USPS access and offer a secure means of receiving mail and packages. They are ideal for commercial use or residential applicati..
$2,700.00
Add to Cart Add to Quote
8 Door Sandstone Florence Cluster Mailbox with Pedestal - 1570-8-SD
DISCOUNT APPLIED AT CHECKOUT!!!
Brand: Florence Product Code: 1570-8-SD
Florence vital™ CBU 1570-8-SD USPS Approved Cluster Box UnitSecure Centralized Mail Delivery SolutionFlorence vital™ CBU mailbox and pedestal (included in each mailbox purchase) provides a secure, free standing outdoor solution for your neighborhood centralized mail delivery needs. These high securi..
$2,434.00
Add to Cart Add to Quote
8 Doors with 2 Parcel Lockers Salsbury Cluster Box Unit (CBU) Mailbox in Sandstone - 3308SAN-U
FAST SHIPPING / 1-2 DAYS!
Brand: Salsbury Product Code: 3308SAN-U
Salsbury 3300 Series Cluster Box Units (CBU's) - USPS AccessSecure Mail & Package Delivery SolutionCluster Box Units (CBU's) manufactured by Salsbury Industries provide USPS access and offer a secure means of receiving mail and packages. They are ideal for commercial use or residential applicati..
$2,700.00
Add to Cart Add to Quote
8 Door White Florence Cluster Mailbox with Pedestal - 1570-8-WH
DISCOUNT APPLIED AT CHECKOUT!!!
Brand: Florence Product Code: 1570-8-WH
Florence vital™ CBU 1570-8-WH USPS Approved Cluster Box UnitSecure Centralized Mail Delivery SolutionFlorence vital™ CBU mailbox and pedestal (included in each mailbox purchase) provides a secure, free standing outdoor solution for your neighborhood centralized mail delivery needs. These high securi..
$2,434.00
Add to Cart Add to Quote
8 Doors with 2 Parcel Lockers Salsbury Cluster Box Unit (CBU) Mailbox in White - 3308WHT-U
FAST SHIPPING / 1-2 DAYS!
Brand: Salsbury Product Code: 3308WHT-U
Salsbury 3300 Series Cluster Box Units (CBU's) - USPS AccessSecure Mail & Package Delivery SolutionCluster Box Units (CBU's) manufactured by Salsbury Industries provide USPS access and offer a secure means of receiving mail and packages. They are ideal for commercial use or residential applicati..
$2,700.00
Add to Cart Add to Quote
8 Tenant Door and 2 Parcel Lockers Salsbury Decorative CBU - Includes Short Pedestal with CBU Top and Pedestal Cover - Type I - 3308R
FAST SHIPPING / 1-2 DAYS!
Brand: Salsbury Product Code: 3308R
Salsbury 3300R Series Regency Cluster Box Units (CBU's) - USPS AccessElegant Secure Mail & Package Delivery SolutionRegency Decorative Cluster Boxes manufactured by Salsbury Industries provide USPS access and offer a secure means of receiving mail and packages. They are designed with ..
$3,700.00
Add to Cart Add to Quote
12 Door Black Postal Products Unlimited F Spec Cluster Box Unit with Pedestal
-17%
Brand: Postal Products Unlimited Product Code: N1031542
Other Colors Available: Please call customer service at 1.800.977.2626. Model Compatibility Identical to Auth-Florence model 1570-12 and Salsbury Industries model 3312. This unit comes complete with tenant locks and a pedestal. Pro..
$2,050.00 $2,472.00
Add to Cart Add to Quote
12 Door Postal Grey Postal Products Unlimited F Spec Cluster Box Unit with Pedestal
-17%
Brand: Postal Products Unlimited Product Code: N1036015
Other Colors Available: Please call customer service at 1.800.977.2626. Model Compatibility Identical to Auth-Florence model 1570-12 and Salsbury Industries model 3312. This unit comes complete with tenant locks and pedestal. Produ..
$2,050.00 $2,472.00
Add to Cart
Salsbury 12 Doors with 1 Parcel Locker Cluster Box Unit (CBU) Mailbox - 3312
FAST SHIPPING / 1-2 DAYS!
Brand: Salsbury Product Code: 3312
Salsbury 3300 Series Cluster Box Units (CBU's) - USPS ApprovedSecure Centralized Mail & Package Delivery SolutionCluster Box Units (CBU's) manufactured by Salsbury Industries provide USPS access and offer a secure means of receiving mail and packages. They are ideal for commercial use or res..
$2,750.00
Add to Cart Add to Quote
12 Door Black Florence Cluster Mailbox with Pedestal - 1570-12-BK
DISCOUNT APPLIED AT CHECKOUT!!!
Brand: Florence Product Code: 1570-12-BK
Florence vital™ CBU 1570-12 Cluster Box Unit - USPS ApprovedSecure Centralized Mail Delivery SolutionThe Florence vital™ CBU 1570-12 provides a secure, free-standing outdoor mailbox solution for centralized mail delivery in residential and commercial developments. This USPS-approved cluster box unit..
$2,472.00
Add to Cart Add to Quote
12 Doors with 1 Parcel Locker Salsbury Cluster Box Unit (CBU) Mailbox in Black - 3312BLK-U
FAST SHIPPING / 1-2 DAYS!
Brand: Salsbury Product Code: 3312BLK-U
Salsbury 3300 Series Cluster Box Units (CBU's) - USPS ApprovedSecure Centralized Mail & Package Delivery SolutionCluster Box Units (CBU's) manufactured by Salsbury Industries provide USPS access and offer a secure means of receiving mail and packages. They are ideal for commercial use or residen..
$2,750.00
Add to Cart Add to Quote
12 Tenant Door Standard Style CBU Mailbox (Pedestal Included) - Type 2 - 1570-12AF
DISCOUNT APPLIED AT CHECKOUT!!!
Brand: Florence Product Code: 1570-12AF
Florence vital™ CBU 1570-12AF - Classic Style Cluster Box Unit - USPS ApprovedSecure Centralized Mail Delivery SolutionThe Florence vital™ CBU 1570-12 provides a secure, free-standing outdoor mailbox solution for centralized mail delivery in residential and commercial developments. This USPS-approve..
$2,472.00
Add to Cart Add to Quote
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Frequently Asked Questions and Answers

What is a cluster mailbox?
A cluster box unit (CBU) mailbox is a freestanding, pedestal-mounted mailbox that consists of multiple mailbox compartments and parcel lockers that can lock individually. The United States Postal Service (USPS) will deliver mail and parcels to the mailbox compartments and parcel lockers.
How do cluster mailboxes work?
The mail carrier has a master key to an Arrow Lock that allows them to access all compartments at once. After delivering the mail, the mail carrier will lock the CBU up and each tenant will retrieve their mail from their individual mailbox compartment and their packages from the parcel lockers with a key.
How much do cluster box units cost?
Cluster box units vary in price and come in 16,13,12,8 and 4 doors - browse our huge selection and add to the cart to see pricing.
Are cluster mailboxes owned by the USPS?
Cluster mailboxes are not always owned by the USPS. In general, the cluster mailbox belongs to whoever initially installed the unit. Some units are purchased and installed privately, while others are installed by the USPS.
Who owns cluster mailboxes?
Cluster mailboxes can be privately owned or owned by the USPS.
What are CBU compartment sizes?
CBU mail compartment sizes are 12" W x 3" H x 15" D, 12" W x 4-3/4" H x 15" D, or 12" W x 6-1/2" H x 15" D depending on which door size you select. They also include 1, 2, or 4 fully integrated parcel locker(s): Regular (12" W x 10" H) and Large (12" W x 13-1/2" H). Outdoor Parcel Lockers include 2 or 4 front loading 12" W x 19-3/4" H x 15" D parcel lockers.
Who is responsible for cluster mailboxes?
According to USPS regulations, the property owners, builders, or developers are responsible for cluster mailboxes. The USPS's Postal Operations Manual states, "Purchase, installation, and maintenance of mail receptacles are the responsibility of the customer."
Are CBU's weatherproof?
We offer durable and corrosion-resistant CBU's constructed of heavy-duty aluminum and stainless steel hardware with a powder coated finish that will stand up well to harsh weather conditions. One compartment in each CBU mailbox is labeled "Outgoing Mail" and includes a weather protection flap.
What are the benefits of cluster box units?
It is a lot more efficient for a mail carrier to deliver mail to one centralized location instead of delivering from house to house. Consequently, CBU's provide the USPS with both time savings and significant fuel-efficiency on their postal vehicles. With CBU's, the USPS also reduces labor costs as each mail carrier will be able to more efficiently deliver their mail. Cluster mailboxes are more secure than individual curbside mailboxes. Multiple safety features protect against mail theft. Each tenant is assigned a mail compartment that is secured with a heavy-duty cam. An anti-fish plate on the rear of the outgoing mail slot helps block the tampering of mail.
What is centralized mail delivery?
Centralized mail delivery is a mail delivery system in which the mail carrier delivers mail for multiple residences at one central location.
Do CBU's meet ADA guidelines?
Yes, cluster mailboxes include mailboxes and lockers that fall within ADA height requirements.
What are parcel lockers?
A parcel locker is a lockable compartment designed to hold packages that will not fit in a standard mailbox compartment.
How do parcel lockers work on cluster box units?
Parcel lockers are included with cluster box units, either alongside them or integrated. When a mail carrier is unable to fit a package into a standard mailbox compartment, they will place your package in a parcel locker. The carrier will then leave the key to the parcel locker in your mailbox. (If you look up the USPS tracking number for your package online, you will see a message "Delivered to Parcel Locker" when your delivery arrives.) To get your package out of the parcel locker, you simply need to use the key the mail carrier has left in your mailbox to unlock the parcel locker. The key will have a tag that indicates which locker contains your package. Once you have unlocked the parcel locker and retrieved your package, the key capture system will secure the parcel locker key in place so that it can't be removed. Only a USPS mail carrier will be able to remove the key with a master key.
How are cluster mailboxes installed?
This short video will take you through each step in the process of installing a cluster mailbox, showing you exactly what you need to do. It also provides a list of the tools you will need. After you've installed your cluster mailbox, you should get in touch with your local Postal Authority to get the master arrow lock installed.
How big are CBU mailbox doors?
CBU mail compartments are available with "A" size doors (12-3/4" W x 3-1/4" H), "B" size doors (12-3/4" W x 5" H), and "C" size doors (12-3/4" W x 6-3/4" H).
Can I customize a cluster box unit?
CBU's come in several colors to choose from—black, bronze, gray, green, sandstone, and white. Other customizable options include custom engraved placards and custom engraved doors (regular or black filled). For a Standard CBU or a an Outdoor Parcel Locker, you can select a CBU decorative top and a CBU decorative pedestal cover.
What is a CBU mailbox configurator?
The CBU Mailbox Configurator will help you determine the optimal number of mailboxes and parcel lockers needed based on your specific requirements. The CBU Mailbox Configurator provides a summary with elevations, rough opening dimensions, sample installation instructions, model numbers, and other important information.
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