21 Door Rear Loading 3621 Salsbury 4B+ Horizontal Mailboxes
Click image to enlarge.
Learn more about our estimated shipping and lead times
Volume Discount Pricing
- Salsbury 21 Door 4B+ horizontal style commercial mailboxes are ideal for apartments, condominiums, office buildings, military bases and residential developments.
- Made entirely of aluminum, 3600 series 4B+ horizontal mailboxes are U.S.P.S. approved and available as front loading units or rear loading units.
- Each aluminum door includes a 5 pin cylinder cam lock with 2 keys and a clear plastic card holder to identify the tenant’s name and/or box number.
- Upgrade your horizontal mailboxes with engraving on the doors.
- The A sized doors on this mailbox are 6-1/2″ W x 5-1/4″ H.
- Salsbury 4B+ standard horizontal mailboxes feature a durable powder coated finish available in 4 contemporary colors
- This horizontal commercial mailbox unit has 21 usuable doors.
- The rear master access panel has a removable lift off cover.
- Theses horizontal mailbox units include factory installed 3/4″ W x 1/4″ D trim and a solid rear cover.
- The 3600 series 4B+ horizontal mailboxes have been U.S.P.S. approved to the required security upgrades of USPS-STD-4B+. 4B+ horizontal mailboxes are approved for replacement and/or retrofit installations effective October 2006.
- View more commercial mailboxes or the rest of our horizontal mailboxes
Finishes and Accents
Swipe left or right.
|Item||Height (inches)||Width (inches)||Depth (inches)|
|Overall with Trim||40.75"||22.75"||16.5"|
- Mailbox Item Number: SIH3621R
- Includes: Mailbox, 2 Keys per Door
- Manufacturer: Salsbury Industries
- Shipping Weight: 70 lbs.
- Locking: Locking mailbox.