Easy to fit into brick pillars, just extend the liner to required depth and fix at that depth using an adhesive sealant. Whole unit can be set into brick pillar using mortar.
The finish is plain aluminium, a Powdercoated Front & Back 345 Letterbox Set with Concertina Liner is available in choice of colours.
Can be padlocked for security.
The 345 sets can be purchased individually or with the liner attached.