1 Gang junction box bottom out
73mm * 73mm * 25mm
The box on the picture is galvanized electrical switch box.
1Gang junction box bottom out
1Gang boxdeep 25mm( bottom out )
The box on the picture is galvanized electrical switch box(steel box,junction box,outlet box).
The specification is 73mm x 73mm x 25mm (1-GANG).
The standard is BS4662
Have a uncork button, used to lengthen the 1-gang box