SALSBURY INDUSTRIES 4B+ Multi-Unit Mailbox

The SALSBURY INDUSTRIES 4B+ Multi-Unit Mailbox (MPN 3504ZRU) is a vertical, lockable unit with 4 doors, measuring 19 in H x 24 3/4 in W x 7 1/2 in D, designed for recessed mounting. It features front access and is…

SKU 3G-OTH-643370

Also listed as: 3504 ZRU · 3504-ZRU

Brand

SALSBURY INDUSTRIES

Item

4B+ Multi-Unit Mailbox

Part Number

3504ZRU

Local availability & support — Singapore

Local office: 20 Woodlands Link #09-05, Singapore 738733
Phone: +65 8878 8355
Payment: Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.

Technical Specifications

SALSBURY INDUSTRIES

Manufacturer Part Number

3504ZRU 

Type

Vertical, 19 in H x 24 3/4 in W x 7 1/2 in D, Recessed Mounting, Lockable 

Doors

4

Technical Documents

No technical documents available for this product.

Request documentation →

Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.

Talk to an engineer

Ask a question

SALSBURY INDUSTRIES Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

Frequently Asked Questions

What is the SALSBURY INDUSTRIES 4B+ mailbox used for?

The SALSBURY INDUSTRIES 4B+ Multi-Unit Mailbox (MPN 3504ZRU) is designed for secure parcel and mail distribution in multi-tenant residential or commercial buildings. Its vertical, lockable design with 4 doors and front access suits recessed mounting in walls or mailroom clusters.

What are the specifications of the SALSBURY 3504ZRU mailbox?

The SALSBURY 3504ZRU is a vertical, lockable multi-unit mailbox with 4 doors, measuring 19 in H x 24 3/4 in W x 7 1/2 in D. It features front access and recessed mounting. The unit is part of the 4B+ series and is manufactured by SALSBURY INDUSTRIES.

Where to buy the SALSBURY 3504ZRU mailbox worldwide?

3G Electric supplies the SALSBURY INDUSTRIES 3504ZRU 4B+ mailbox to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for a quote and lead time on this lockable multi-unit mailbox.

How to install a recessed SALSBURY 4B+ mailbox?

For recessed mounting of the SALSBURY 4B+ mailbox, ensure the wall opening matches the 19 in H x 24 3/4 in W x 7 1/2 in D dimensions. Secure the unit per local building codes, using appropriate fasteners for the wall type. Always follow the manufacturer's installation guide for proper alignment and locking mechanism function.

Used in

Common applications for SALSBURY INDUSTRIES

Multi-tenant residential buildings — Salsbury Cluster Box Unit (MPN 3312GRY-U) with 13 doors for centralized mail delivery.

Commercial office complexes — Salsbury 4C series recessed mailbox (MPN 3706D-2PAFU) for wall-mounted mail distribution.

Institutional facilities — Salsbury 4B+ vertical surface-mount mailbox (MPN 3503ZSU) for compact mail organization.

Outdoor mail kiosks — Salsbury aluminum pedestal (MPN 3395BRZ) for mounting Cluster Box Units in parking areas.

Retrofit projects — Salsbury pedestal (MPN 3385BLK) for replacing or upgrading existing CBU mounting bases.

High-traffic mailrooms — Salsbury horizontal recessed mailbox (MPN 3711S-2PAFU) with lockable doors for secure mail handling.

Not sure this is the right part? Photo-identify it→

SALSBURY INDUSTRIES Products

3G Electric supplies SALSBURY INDUSTRIES multi-unit mailboxes. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

Browse all SALSBURY INDUSTRIES products →Contact our engineers →