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Description
A through wall letter box for brick pillars and boundary walls, with a decorative cast front and a locking door at the rear. The sides are powder coated stainless steel and the front is cast aluminium, with a 230 x 50mm letter slot. It is 430mm high, 300mm wide and 250mm deep, and the rear panel comes off with an allen key so it is easy to build into a wall. The price is for one.

Specifications
| Height | 430mm |
|---|---|
| Width | 300mm |
| Depth | 250mm |
| Sides | Stainless steel, powder coated |
| Front | Cast aluminium, decorative, with MAIL cast into the flap |
| Letter slot | 230 x 50mm |
| Opening | Key-locking door at the rear |
| Fitting | Rear panel removes with an allen key |
| Weight | About 8.49 kg |
| Sold as | One |
Why it works
Built for walls. Take off the rear panel with an allen key and the box can be set into a pillar or wall, then the panel goes back on.
Bigger slot. At 230 x 50mm it takes C4 envelopes flat, along with magazines and slim packets.
Secure collection. The post goes in from the road and stays behind a key lock on your side of the wall.
Where it is used
- Homes with a front gate or a long drive
- Farms, offices and units with no letter plate
- Replacing a damaged or undersized post box
Choosing the right letter box
Choose by how the post will be collected. A front opening box empties on the street side, while a rear opening box empties from inside your boundary. Check the slot width against what you receive: a sheet of A4 is 210mm wide and a C4 envelope is 229mm.
| Box | Size (H x W x D) | Letter slot | Fits | Choose |
|---|---|---|---|---|
| Wall mounted, front opening | 405 x 255 x 90mm | Not published | On the face of a wall | View |
| Rear opening | 400 x 280 x 230mm | 225 x 35mm | In a gate, fence or wall | View |
| Through wall, rear opening | 430 x 300 x 250mm | 230 x 50mm | Built into a wall or pillar | This one |
Fitting and care
Build an opening to suit the 430 x 300mm body and allow for the 250mm depth. Take off the rear panel to fix the box into the wall, then refit it so that you can reach the locking door from behind. Depending on where it stands, it may need yearly maintenance and repainting. If it is open to the weather, seal the edges so water cannot get in.
Frequently asked questions
Does it lock?
Yes, the rear door has a key lock.
Can it go in a standard brick pillar?
It needs a wall or pillar that can take a 430 x 300mm opening, with access to the rear door from behind. Measure before you build.
Will a large envelope fit?
Yes, the 230 x 50mm slot takes a C4 envelope flat, as well as magazines and slim packets.
Is it weatherproof?
If it is open to the weather, seal the edges so water cannot get in. It may need repainting from time to time, depending on where it stands.
Ordering and delivery
Order online for Express UK Delivery, with same-day dispatch on orders placed before 2pm, Monday to Friday. For larger quantities, call 01744 520 110 or email sales@industrialsuppliesco.co.uk and we will confirm stock and delivery before you order.
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Logos are for illustrative purposes only and do not imply official endorsement
About Us
Suppliers to Ministry of Defence, NATO, US Airforce and Most UK Councils, Schools, Universities, Hospitals & various Government departments
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