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4B+ Horizontal Mailboxes

Designed for retrofits and replacement projects, our 4B+ Horizontal Mailboxes meet USPS regulations for specific installations in older buildings. Ideal for indoor use in multi-unit residential or commercial properties, these mailboxes offer secure, centralized mail delivery with a compact, wall-mounted design.

Sweatfully is an authorized dealer for all the brands we carry, so you can shop with confidence knowing you're getting genuine, high-quality products backed by full manufacturer warranties and expert support.

Salsbury Replacement Door and Lock - Standard A Size - for 4B+ Horizontal Mailbox - with (2) Keys - Sandstone - Sweatfully
$150.00 - $150.00
$150.00
$150.00 - $150.00
$150.00

Salsbury Replacement Door and Lock - Standard A Size - for 4B+ Horizontal Mailbox - with (2) Keys - Sandstone

Salsbury Industries Mailboxes

Replacement Door and Lock - Standard A Size - for 4B+ Horizontal Mailbox - with (2) Keys - SandstoneUsually Ships Within 1-2 Days

$150.00 - $150.00
$150.00
$150.00 - $150.00
$150.00
Salsbury Replacement Door and Lock - Standard A Size - for 4B+ Horizontal Mailbox - with (2) Keys - Bronze - Sweatfully
$150.00 - $150.00
$150.00
$150.00 - $150.00
$150.00

Salsbury Replacement Door and Lock - Standard A Size - for 4B+ Horizontal Mailbox - with (2) Keys - Bronze

Salsbury Industries Mailboxes

Replacement Door and Lock - Standard A Size - for 4B+ Horizontal Mailbox - with (2) Keys - BronzeUsually Ships Within 1-2 Days

$150.00 - $150.00
$150.00
$150.00 - $150.00
$150.00
Salsbury Key Blanks - for Standard Locks of 4B+ Horizontal Mailboxes - Box of (50) - Sweatfully
$150.00 - $150.00
$150.00
$150.00 - $150.00
$150.00

Salsbury Key Blanks - for Standard Locks of 4B+ Horizontal Mailboxes - Box of (50)

Salsbury Industries Mailboxes

Key Blanks - for Standard Locks of 4B+ Horizontal Mailboxes - Box of (50)Usually Ships Within 1-2 Days

$150.00 - $150.00
$150.00
$150.00 - $150.00
$150.00
Salsbury Combination Lock - for 4B+ Horizontal Mailbox Door - Sweatfully
$125.00 - $125.00
$125.00
$125.00 - $125.00
$125.00

Salsbury Combination Lock - for 4B+ Horizontal Mailbox Door

Salsbury Industries Mailboxes

Combination Lock - for 4B+ Horizontal Mailbox DoorUsually Ships Within 1-2 Days

$125.00 - $125.00
$125.00
$125.00 - $125.00
$125.00
Salsbury Master Commercial Lock - for Private Access of FL 4B+ Horizontal Mailbox and Parcel Locker - with (2) Keys - Sweatfully
$120.00 - $120.00
$120.00
$120.00 - $120.00
$120.00

Salsbury Master Commercial Lock - for Private Access of FL 4B+ Horizontal Mailbox and Parcel Locker - with (2) Keys

Salsbury Industries Mailboxes

Master Commercial Lock - for Private Access of FL 4B+ Horizontal Mailbox and Parcel Locker - with (2) KeysUsually Ships Within 1-2 Days

$120.00 - $120.00
$120.00
$120.00 - $120.00
$120.00
Numbers - Self Adhesive Sheet of (100) - for 4B+ Horizontal Mailboxes - 101-200 Series - Sweatfully
$120.00 - $120.00
$120.00
$120.00 - $120.00
$120.00

Numbers - Self Adhesive Sheet of (100) - for 4B+ Horizontal Mailboxes - 101-200 Series

Salsbury Industries Mailboxes

Numbers - Self Adhesive Sheet of (100) - for 4B+ Horizontal Mailboxes - 101-200 SeriesUsually Ships Within 1-2 Days

$120.00 - $120.00
$120.00
$120.00 - $120.00
$120.00
Numbers - Self Adhesive Sheet of (100) - for 4B+ Horizontal Mailboxes - 401 to 500 Series - Sweatfully
$120.00 - $120.00
$120.00
$120.00 - $120.00
$120.00

Numbers - Self Adhesive Sheet of (100) - for 4B+ Horizontal Mailboxes - 401 to 500 Series

Salsbury Industries Mailboxes

Numbers - Self Adhesive Sheet of (100) - for 4B+ Horizontal Mailboxes - 401 to 500 SeriesUsually Ships Within 1-2 Days

$120.00 - $120.00
$120.00
$120.00 - $120.00
$120.00
Numbers - Self Adhesive Sheet of (100) - for 4B+ Horizontal Mailboxes - 301 to 400 Series - Sweatfully
$120.00 - $120.00
$120.00
$120.00 - $120.00
$120.00

Numbers - Self Adhesive Sheet of (100) - for 4B+ Horizontal Mailboxes - 301 to 400 Series

Salsbury Industries Mailboxes

Numbers - Self Adhesive Sheet of (100) - for 4B+ Horizontal Mailboxes - 301 to 400 SeriesUsually Ships Within 1-2 Days

$120.00 - $120.00
$120.00
$120.00 - $120.00
$120.00
Numbers - Self Adhesive Sheet of (100) - for 4B+ Horizontal Mailboxes - 201 to 300 Series - Sweatfully
$120.00 - $120.00
$120.00
$120.00 - $120.00
$120.00

Numbers - Self Adhesive Sheet of (100) - for 4B+ Horizontal Mailboxes - 201 to 300 Series

Salsbury Industries Mailboxes

Numbers - Self Adhesive Sheet of (100) - for 4B+ Horizontal Mailboxes - 201 to 300 SeriesUsually Ships Within 1-2 Days

$120.00 - $120.00
$120.00
$120.00 - $120.00
$120.00
Numbers - Self Adhesive Sheet of (100) - for 4B+ Horizontal Mailboxes - 1 to 100 Series - Sweatfully
$120.00 - $120.00
$120.00
$120.00 - $120.00
$120.00

Numbers - Self Adhesive Sheet of (100) - for 4B+ Horizontal Mailboxes - 1 to 100 Series

Salsbury Industries Mailboxes

Numbers - Self Adhesive Sheet of (100) - for 4B+ Horizontal Mailboxes - 1 to 100 SeriesUsually Ships Within 1-2 Days

$120.00 - $120.00
$120.00
$120.00 - $120.00
$120.00
Resettable Combination Lock - for 4B+ Horizontal Mailbox Door - Sweatfully
$120.00 - $120.00
$120.00
$120.00 - $120.00
$120.00

Resettable Combination Lock - for 4B+ Horizontal Mailbox Door

Salsbury Industries Mailboxes

Resettable Combination Lock - for 4B+ Horizontal Mailbox DoorUsually Ships Within 1-2 Days

$120.00 - $120.00
$120.00
$120.00 - $120.00
$120.00
Master Control Key - for #3682 Resettable Combination Lock of 4B+ Horizontal Mailbox Door - Sweatfully
$100.00 - $100.00
$100.00
$100.00 - $100.00
$100.00

Master Control Key - for #3682 Resettable Combination Lock of 4B+ Horizontal Mailbox Door

Salsbury Industries Mailboxes

Master Control Key - for #3682 Resettable Combination Lock of 4B+ Horizontal Mailbox DoorUsually Ships Within 1-2 Days

$100.00 - $100.00
$100.00
$100.00 - $100.00
$100.00
Salsbury Custom Lock Cylinder Installation - for 4B+ Horizontal Mailbox Door - Cylinder and Housing Provided By Owner - Sweatfully
$95.00 - $95.00
$95.00
$95.00 - $95.00
$95.00

Salsbury Custom Lock Cylinder Installation - for 4B+ Horizontal Mailbox Door - Cylinder and Housing Provided By Owner

Salsbury Industries Mailboxes

Custom Lock Cylinder Installation - for 4B+ Horizontal Mailbox Door - Cylinder and Housing Provided By OwnerAllow 5-7 Days For Shipping

$95.00 - $95.00
$95.00
$95.00 - $95.00
$95.00
Salsbury Thumb Latch - for 4B+ Horizontal Mailbox Door - Sweatfully
$67.00 - $67.00
$67.00
$67.00 - $67.00
$67.00

Salsbury Thumb Latch - for 4B+ Horizontal Mailbox Door

Salsbury Industries Mailboxes

Thumb Latch - for 4B+ Horizontal Mailbox DoorUsually Ships Within 1-2 Days

$67.00 - $67.00
$67.00
$67.00 - $67.00
$67.00
Salsbury Custom Door Engraving - Regular - for Gold 4B+ Horizontal Mailbox Door - Sweatfully
$54.25 - $54.25
$54.25
$54.25 - $54.25
$54.25

Salsbury Custom Door Engraving - Regular - for Gold 4B+ Horizontal Mailbox Door

Salsbury Industries Mailboxes

Custom Door Engraving - Regular - for Gold 4B+ Horizontal Mailbox DoorAllow 5-7 Days For Shipping

$54.25 - $54.25
$54.25
$54.25 - $54.25
$54.25
Salsbury Custom Door Engraving - Regular - for Sandstone 4B+ Horizontal Mailbox Door - Sweatfully
$54.25 - $54.25
$54.25
$54.25 - $54.25
$54.25

Salsbury Custom Door Engraving - Regular - for Sandstone 4B+ Horizontal Mailbox Door

Salsbury Industries Mailboxes

Custom Door Engraving - Regular - for Sandstone 4B+ Horizontal Mailbox DoorAllow 5-7 Days For Shipping

$54.25 - $54.25
$54.25
$54.25 - $54.25
$54.25
Salsbury Custom Door Engraving - Regular - for Aluminum 4B+ Horizontal Mailbox Door - Sweatfully
$54.25 - $54.25
$54.25
$54.25 - $54.25
$54.25

Salsbury Custom Door Engraving - Regular - for Aluminum 4B+ Horizontal Mailbox Door

Salsbury Industries Mailboxes

Custom Door Engraving - Regular - for Aluminum 4B+ Horizontal Mailbox DoorAllow 5-7 Days For Shipping

$54.25 - $54.25
$54.25
$54.25 - $54.25
$54.25
Salsbury Custom Door Engraving - Regular - for Bronze 4B+ Horizontal Mailbox Door - Sweatfully
$54.25 - $54.25
$54.25
$54.25 - $54.25
$54.25

Salsbury Custom Door Engraving - Regular - for Bronze 4B+ Horizontal Mailbox Door

Salsbury Industries Mailboxes

Custom Door Engraving - Regular - for Bronze 4B+ Horizontal Mailbox DoorAllow 5-7 Days For Shipping

$54.25 - $54.25
$54.25
$54.25 - $54.25
$54.25
Salsbury Custom Door Engraving - Black Filled - for Gold 4B+ Horizontal Mailbox Door - Sweatfully
$54.25 - $54.25
$54.25
$54.25 - $54.25
$54.25

Salsbury Custom Door Engraving - Black Filled - for Gold 4B+ Horizontal Mailbox Door

Salsbury Industries Mailboxes

Custom Door Engraving - Black Filled - for Gold 4B+ Horizontal Mailbox DoorAllow 5-7 Days For Shipping

$54.25 - $54.25
$54.25
$54.25 - $54.25
$54.25
Salsbury Custom Door Engraving - Black Filled - for Bronze 4B+ Horizontal Mailbox Door - Sweatfully
$54.25 - $54.25
$54.25
$54.25 - $54.25
$54.25

Salsbury Custom Door Engraving - Black Filled - for Bronze 4B+ Horizontal Mailbox Door

Salsbury Industries Mailboxes

Custom Door Engraving - Black Filled - for Bronze 4B+ Horizontal Mailbox DoorAllow 5-7 Days For Shipping

$54.25 - $54.25
$54.25
$54.25 - $54.25
$54.25
Salsbury Custom Door Engraving - Black Filled - for Aluminum 4B+ Horizontal Mailbox Door - Sweatfully
$54.25 - $54.25
$54.25
$54.25 - $54.25
$54.25

Salsbury Custom Door Engraving - Black Filled - for Aluminum 4B+ Horizontal Mailbox Door

Salsbury Industries Mailboxes

Custom Door Engraving - Black Filled - for Aluminum 4B+ Horizontal Mailbox DoorAllow 5-7 Days For Shipping

$54.25 - $54.25
$54.25
$54.25 - $54.25
$54.25
Salsbury Additional Key - for 4B+ Horizontal Mailbox Standard Lock - Sweatfully
$54.25 - $54.25
$54.25
$54.25 - $54.25
$54.25

Salsbury Additional Key - for 4B+ Horizontal Mailbox Standard Lock

Salsbury Industries Mailboxes

Additional Key - for 4B+ Horizontal Mailbox Standard LockUsually Ships Within 1-2 Days

$54.25 - $54.25
$54.25
$54.25 - $54.25
$54.25
Salsbury Plexiglass Window - for 4B+ Horizontal Mailbox Door - Sweatfully
$52.55 - $52.55
$52.55
$52.55 - $52.55
$52.55

Salsbury Plexiglass Window - for 4B+ Horizontal Mailbox Door

Salsbury Industries Mailboxes

Plexiglass Window - for 4B+ Horizontal Mailbox DoorAllow 5-7 Days For Shipping

$52.55 - $52.55
$52.55
$52.55 - $52.55
$52.55
Salsbury Card Holder - Clear Plastic - for 4B+ Horizontal Mailbox Door - Sweatfully
$52.55 - $52.55
$52.55
$52.55 - $52.55
$52.55

Salsbury Card Holder - Clear Plastic - for 4B+ Horizontal Mailbox Door

Salsbury Industries Mailboxes

Card Holder - Clear Plastic - for Cell Phone Storage Locker DoorUsually Ships Within 1-2 Days

$52.55 - $52.55
$52.55
$52.55 - $52.55
$52.55
Custom Engraved Self Adhesive Placard - for 4B+ Horizontal Mailbox Door - Sweatfully
$52.55 - $52.55
$52.55
$52.55 - $52.55
$52.55

Custom Engraved Self Adhesive Placard - for 4B+ Horizontal Mailbox Door

Salsbury Industries Mailboxes

Custom Engraved Self Adhesive Placard - for 4B+ Horizontal Mailbox DoorUsually Ships Within 1-2 Days

$52.55 - $52.55
$52.55
$52.55 - $52.55
$52.55

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