Florence part numbers are arranged so that you can quickly determine the series and the number of mail slots each product has. 

4C16D-20-BK

4C= The model

16= How many rows high. This can be between 06 & 16. The larger the number the taller the unit will be. 

D= Double wide (D) or single wide (S).  

20= How many mail slots the unit has. 

BK= The color code. Sandstone (SD), Black (BK), Dark Bronze (DB), White (WH), Forest Green (FG), Silver Speck (SS), Gold Speck (GS), Antique Bronze (AB), Postal Grey (PG), 

140075A

1400= The model

7= How many doors high. This can be 5 to 7 on the 1400 series 

5= How many doors wide. This can be 2 to 5 on the 1400 series

A= Color code. These units only come in anodized aluminim so this will always be A. 

1600106A

1600= The model. 1600’s are front loading and 1700’s are rear loading units. THESE UNITS ARE FOR PRIVATE DELIVERY ONLY. THE USPS WILL NOT DELIVER TO THESE UNITS. 

10= How many doors high. This can be 7 to 10 on the 1600 & 1700 series 

6= How many doors wide. This can be 2 to 6 on the 1600 & 1700 series 

A= Color code. These units only come in anodized aluminim so this will always be A.