... of switch box ,surface box sizes: 3"x3" ,3"x6"20mm/ 25mm knockouts color : white Square stamping conduit 1 ... ) name:switch box, 2 gang box , 1 gang box,flushing box,surface box2) ... are available6)2 gang box are used as surface mounting control box , junction box or general ... , components12)PVC 2 gang box are used as surface mounting ,control box , switch box or general ...