Our floor sockets are designed to fit into UK standard size single and double wall boxes and come supplied with a spring loaded cover plate. Size: 145mm x 85mm (94mm including spring loaded barrel). This floor socket can fit 4 x data modules (50mm x 25mm), or 2 x module (50mm x 50mm). Please buy these separately. G&H Electrical Accessories are a UK manufacturer of high quality switches and sockets. All G&H plates are manufactured to the highest standard from solid brass or steel and are covered by a 24 month warranty. The entire range fits into UK standard wall boxes (see below for depth recommendations).