... switch box ,flushing box , sizes: 3"x3" ,3"x6"20mm/ 25mm knockouts color : white material : pvc ) name:swithc box, 2 gang box , 1 gang box ... available6)2 gang box are used as surface mounting control box , junction box or general service box7)switch box protects wire and ... ,electrical equipment , components12)PVC 2 gang box are used as surface mounting ,control box , switch box or general service ...