all kinds of switch box ,surface box sizes: 3"x3" ,3"x6"20mm/ 25mm knockouts ... 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 ... equipment , components12)PVC 2 gang box are used as surface mounting ,control box , switch box or general service box ...