... box, 2 gang box , 1 gang box,flushing box,surface box2) sizes: 3"x3",3"x6"box, 20mm/25mm ... order are available6)2 gang box are used as surface mounting control box , junction box or general service box7) ... equipment , components12)PVC 2 gang box are used as surface mounting ,control box , switch box or general service box 3x3 ... 3x6 box , pvc material ,200pcs/outer packing 3x3 plastic surface box