12" Slimline Letterbox in WHITE

Price £14.09 (Inc. VAT)
£11.74 (Ex. VAT)
(16 reviews) Write a Review
Part Number:
LBX-12-SLIM-White (LBX30000) (5055621409591)
In Stock
Delivery Cost:
Calculated at Checkout
12" Slimline Letterbox in WHITE

12” (315mm) Slimline Replacement Letterplate / Letterbox in WHITE

Designed for use in narrow midrail of limited depth or at the bottom of a UPVC or aluminium double glazed door. 

 Although this is classed as a 12" letterplate all sizes are metric. The letterbox is just over 12" long.


  • Size of letterbox frame is 315mm x 50mm 
  • Internal measurement is 268mm x 38mm


Telescopic sleeve depths from 36mm -70mm.

Secure fixing from inside by 2  self-tapping screws which are 290mm apart.

Other colours also available - Click here for details

Panel or Midrail? Checkout the drawing below.




For the full letterbox measuring guide click here


16 Reviews Hide Reviews Show Reviews

  • 5
    12" Slimline Letterbox

    Posted by Alan on Mar 01, 2019

    Quick answer to my preliminary question about my non-standard size. Fast delivery. Fast installation.

  • 4
    Graeme Davies

    Posted by Graeme Davies on Jan 30, 2019

    Perfect size for replacement of existing broken box.

  • 5
    12" slimline UPVC letter box cover

    Posted by sue saunders on Dec 28, 2018

    fits front door like a glove and looks good

  • 4

    Posted by JohnE on Jul 20, 2018


  • 4
    12" Slimline Letterbox

    Posted by Irwin on Jul 04, 2018

    Second one I have had to fit due to postman breaking flap from original! Only problem is that you have to cut some of the depth from one side to make it fit a slimmer door, otherwise it does the job. Good price as well.

  • 4
    12" Slimline Letterbox in WHITE

    Posted by H,He on Mar 01, 2018

    It does the job and arrived in a timely manner. What more do you need?

  • 5
    12" Slimline letterbox white

    Posted by Gary on Jan 14, 2018

    Perfect replacement thanks to the detailed dimensions given on the website, very pleased and the item arrived promptly as well all good.

  • 5
    slimline letterbox

    Posted by Michael Roe on Nov 13, 2017

    Very pleased with the product .Good price and a quick delivery Thanks M Roe

  • 4
    12 2 slimline letterbox

    Posted by r pugh on Aug 15, 2017

    part is perfect and fits easily . delivery to wrong address unfortunately delayed being able to fit