Appleby SB619 is a 35mm deep, 1 Gang, dry lining box.
With tough yellow adjustable nylon lugs which have superior strength.
large bearing and a large flange around the front which prevents it from slipping in to cavity walls.
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.