The Appleby SB619 is a 35mm deep, 1 Gang, dry lining box. It has tough yellow adjustable nylon lugs which have superior strength thanks to large bearing and a large flange around the front which prevents it from slipping in to cavity walls, as well as matching the profile of the accessory front plate that will be fitted with it.
There are two 20mm side knockout cables entries plus a 25mm base knockout. It is suitable for use with board with a thickness of 6.35-15mm.