2 Gang Double Black Square Edge Surface Pattress Back Box 32mm Deep 32mm Plastic Double Gang Back Box QTY = 1 This listing is also available in packs of 5., Overview - Back boxes are used behind face plates, they allow the face plate to be screwed and secured. Standard UK sized back box., Brass Earth Terminals. Loops 32mm Deep Twin Plastic Surface Mounted Back Box - 2 Gang Wall Pattress Outlet : : DIY & Tools Overview - Back boxes are used behind face plates, they allow the face plate to be screwed and secured. The back box itself should be screwed into position. Common face plates which may be used with a back box are light switches, plug sockets, modular systems, etc. Different face plates... The back box itself should be screwed into position. 32mm Plastic Double Gang Back BoxQTY = 1This listing is also available in packs of 5.Overview - Back boxes are used behind face plates, they allow the face plate to be screwed and secured. The back box itself should be screwed into position. Common face plates which may be used with a back box are light switches, plug Electric Sockets Falcon 32mm Deep Radius Corner Surface Pattress Boxes 2 Gang | ExpertE Wall Socket Flame retardant urea moulding.