1)" wall box " with M4 nut 2)Sizes: 86x86x45mm 3 ... for use 5) good apperenc 1) name:switch box, 2 gang box , 1 gang box,flushing box,surface box,inner box2) ... equipment , components12)PVC 2 gang box are used as surface mounting ,control box , switch box or general service box ... sizes: 86x86x45 surface box ,pvc material, 100pcs/outer packing , one gand box sizes ...