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Description
Salsbury Industries Surface Mounted 4C Horizontal Mailbox Unit – Double Column, 29 MB1 Doors, Front-Loading, Private AccessSurface Mounted 4C Horizontal Mailbox Unit, 29 Door, Private Access Heavy duty aluminum 4C horizontal mailbox with matching surface mounted enclosure for sites without wall depth for recessing. Front loading, double column unit features 29 MB1 tenant doors, outgoing mail slot with weather hood, and master commercial locks for private access. Key Features: Durable Construction: Heavy duty aluminum body with stainless steel hardware and powder coated
Surface-Mounted 4C Horizontal Mailbox Unit, 29-Door, Private Access
Heavy-duty aluminum 4C horizontal mailbox with matching surface-mounted enclosure for sites without wall depth for recessing. Front-loading, double-column unit features 29 MB1 tenant doors, outgoing mail slot with weather hood, and master commercial locks for private access.
Key Features:
- Durable Construction: Heavy-duty aluminum body with stainless steel hardware and powder-coated finish for indoor/outdoor use
- Secure Access: Master commercial lock(s) and heavy-duty cam locks; anti-fish plate on outgoing slot to deter tampering
- Convenient Front Loading: Easy-opening master door panels and labeled outgoing mail compartment with hooded slot
- Versatile Configuration: Double-column, maximum-height unit with 29 MB1 doors (3-1/4" H x 12-3/4" W)
- Surface-Mount Enclosure: Installs where recessed mounting isn’t possible; minor assembly required
Please check the Product Data Sheet Here
Specifications Table:
| Specification | Details |
|---|---|
| Series | Salsbury 3800 Series |
| Configuration | Double column, maximum height, front loading, private access |
| Tenant Doors | 29 MB1 doors (3-1/4" H x 12-3/4" W) |
| Overall Dimensions | 31.75" W x 57.75" H x 17" D |
| Construction | Heavy-duty aluminum with stainless steel hardware |
| Finish Options | Powder coated—aluminum, bronze, sandstone, black |
| Enclosure | Includes matching surface-mounted enclosure |
| Locks | Master commercial lock(s) with 2 keys; heavy-duty cam locks on doors |
| Outgoing Mail | Compartment labeled "Outgoing Mail" with 11-3/4" W x 3/4" H slot and weather protection hood; anti-fish plate |
| Access | Front access through 1 or 2 master door panels |
| Use Case | Indoor or outdoor use |
| Parcel Lockers | Optional fully integrated or stand-alone parcel lockers (PL3–PL6) |
| Compliance | ADA height compliant units available |
| Included Components | 3716D-29 mailbox, 3816D surface enclosure, master commercial locks |
Frequently Asked Questions (FAQ):
Q: Is this mailbox for USPS delivery?
A: This configuration is for private access with master commercial locks, not USPS arrow lock delivery.
Q: Can it be installed outdoors?
A: Yes, it is designed for indoor or outdoor use with a powder-coated finish and weather-protected outgoing slot.
Q: What are the overall dimensions?
A: Approximately 31.75" W x 57.75" H x 17" D.
Q: How many tenant compartments does it include?
A: 29 MB1-sized doors in a double-column layout, plus an outgoing mail compartment.
Q: Is ADA compliance available?
A: ADA height compliant units are available; verify local requirements and select appropriate configurations.
Streamlined Mail Center Elegance
This sleek, powder-coated mailbox wall reads as architectural—clean lines and a refined aluminum finish bring order and sophistication to shared spaces. The double-column symmetry and discreet numbering create a modern rhythm that complements contemporary lobbies. Style it with warm wood accents and matte black hardware for a balanced, luxe statement. A smart essential for polished, high-performance communal living.
Elevate your property’s mail center with secure, streamlined performance—choose this 4C surface-mounted unit today.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
Based on 184 reviews
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Product Reviews
★★★★★ 5
Stable, flexible in deployment configuration, creates true privacy and looks great.
Size: 3 Panel 12FT W
This is the second room divider panel I have installed, and there are several features about this one that I like much better than my older one.
The fact that there are no gaps and that the material is thicker means you get more privacy or more hiding power, if you wish. My older divider has vertical spaces between each of the panels and the panels are half as wide as the Siebwin panels, so there are many vertical spaces. The Siebwin divider really creates privacy.
Another feature that I really appreciate is that the legs are wider and stand off from the floor. On my older one the legs are flat and they're rather awkward to adjust because they create more drag on the floor. The feet on the older one also loosen if you turn them counter clockwise, so adjustments of configuration that require the feet to be moved are more complex.
The older divider also must be deployed in a zig-zag fashion because he feet are not as wide, but this new one can be deployed and stable in a straight, an "N" shape or an arc. They are both the same length, but because the older one must be use in a zig-zag deployment it doesn't reach to the length of the new one.
The Siebwin divider definitely costs more at $103.48, but it sports several features and advantages over the other brand, so it does a better job and is worth the extra cost.
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Reviewed in the United States on May 25, 2026
★★★★★ 4
Easy to assemble, does the job, material is shiny nylon and shows creases, minor defects, sloppy
Size: 3 Panel 12FT W, Size: 3 Panel 12FT W
The Siebwin room divider is a good idea, and for the price, it mostly delivers on the intended functionality. I ordered the 12 foot, 3-panel version mainly to hide an unfinished basement storage area that had become an eyesore. It works well for that purpose and gives the space a cleaner appearance without spending the kind of money that more decorative dividers or custom partitions cost. If you need something temporary, portable, or mainly functional, this is a viable option.
There are a few limitations that became obvious during setup and use. The first thing I noticed was that the weld quality on some of the metal poles is fairly sloppy. Once the cover is installed, you do not really see it, but up close, it does not look especially refined or professional. The blackout material also is not a matte canvas style fabric as I expected. It has more of a shiny nylon appearance, and the creases are fairly visible. Being that it’s more of a nylon, I’d be hesitant to try steaming it to remove the creases. However, the creases do not matter if you are using it in a basement, dorm, or shared room, but for photography, video work, or a professional office setting, the appearance could be disappointing. The fabric is thick enough, though. It blocks visibility well enough, but strong light behind it still shows through to some extent, nothing deal-breaking. Also, my fabric appeared to be slightly defective. The hook and loop strip on one of the bottom sections was off-center and couldn't be totally attached because it was lined up with one of the legs. I originally hoped to use this as a video backdrop, but I will probably end up replacing the fabric with a proper green screen or canvas material while continuing to use the frame itself. For now, it does a good job of covering my basement junk.
Assembly was actually easier than I expected and took roughly 15 to 20 minutes. The longer vertical poles are tethered together similarly to tent poles, which made setup straightforward and fairly intuitive. The shorter horizontal pieces slide and snap together to the top and bottom of the vertical assembly. After each section is assembled, the divider panels connect together with metal plates and two knurled screws (at the top and bottom), so no tools are really required. A few screws were difficult to start because paint had gotten into the threads, but once they caught, they tightened down normally. The feet install with similar knurled fasteners and help keep the divider reasonably stable. One thing to watch for during setup is the fabric orientation. There is one arrow indicator in the middle of the fabric to indicate up. However, if you need another indicator, the smaller hook and loop strip goes on the bottom while the longer strip goes on top. I realized mine was upside down right before finishing and had to redo it. I wasn't difficult to redo, despite the defect in mine.
The overall design is practical and easy to move around. I do like that the panels can fold and bend into different shapes depending on the space. The widened feet help stability, although when trying to stretch the fabric tight, I noticed the poles sometimes wanted to overlap slightly at the joints. Tightening everything helped somewhat, but it still happened occasionally. The divider feels adequate for normal indoor use, though I would not expect premium durability or luxury-level fit and finish at this price point. The entire device can also be easily disabled and stored in a tote if you need it completely out of the way. It comes with assembly instructions, but even if you didn’t have them, it’s easy to build without them (save a mistake or two).
In terms of value, I think the Siebwin divider mostly matches its price. Around $100 gets you a large freestanding partition with decent usability and easy assembly, but there are compromises in materials, appearance, and refinement. The defects are also off-putting, but hopefully you won't have them. Higher-end room dividers can easily cost two or three times more, so some of the tradeoffs are expected. I also noticed cheaper alternatives online, but based on the quality here, I suspect those would probably have even more issues. For practical home use, temporary privacy, hiding storage areas, or separating shared spaces, this is a good option as long as expectations stay realistic.
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Reviewed in the United States on May 18, 2026
★★★★★ 3
Works well but takes up more space than expected
Size: 2 Panel 8FT W, Size: 2 Panel 8FT W
This room divider does the job for creating a little extra privacy and was easy enough to set up. The panels feel decent quality and the wider feet help keep it more stable than some cheaper screens I’ve tried. My only issue is that it takes up a bit more room than I expected, especially with the feet sticking out. It’s still portable and folds away nicely, but definitely measure your space first. Overall it works well for separating a room or blocking off an area temporarily. i wish it came in other colors
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Nice divider, serves it's purpose well!
Size: 3 Panel 12FT W
This room divider worked out very well for what I needed. I wanted a simple way to create a little more privacy and separation in a larger room without doing anything permanent, and this divider was an easy solution. The panels provide good coverage, and the black color gives it a clean, modern appearance that blends in nicely with different décor styles.
Assembly was fairly straightforward, and once set up, the wider feet helped keep the divider stable on the floor. I was especially happy with how flexible the panels are to arrange. You can keep it mostly straight, angle it around furniture, or create a more enclosed private space depending on the layout you need.
The material allows light to filter through slightly while still offering a noticeable sense of privacy. I’ve used it for separating a workspace area, but it would also work well in bedrooms, apartments, dorms, studios, or shared living spaces. Another plus is that it can be folded and moved without too much effort when you want to change the setup.
Overall, this divider delivers a good balance of functionality, portability, and appearance. It’s a practical option for anyone needing temporary room separation without installing permanent walls or curtains.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Perfect for Adding Privacy to a Piano Studio
Size: 2 Panel 8FT W, Size: 2 Panel 8FT W
I Ordered the 2 Panel version which is way too big for my needs... that's on me. So keep in mind that the picture shows a fabric made for two panels only being used on one and hence it is not pulled tight; it would pull tight and not be so wrinkly if it was set up properly as two panels. The metal pools that make up the panels seem to be well made, stable, and of good quality. They were very easy to put together and they stand up tall with plenty of height. The appearance of it with the fabric on it isn't as elegant as it could be, but it still looks good enough. The material is plenty solid, not allowing light through it, and thereby making a solid barrier. I am using it to block the view out the studio door when a student is sitting at the piano to avoid distractions from the hallway. It will allow a student to enter the studio with our distracting the student who is at the piano.
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Reviewed in the United States on May 18, 2026