... box ,flushing box , sizes: 3"x3" ,3"x6"20mm/ 25mm knockouts color : white material : pvc 1) name:swithc box, 2 gang box , 1 gang box,flushing box ... ,wall box2) sizes: 3"x3",3"x6"box, ... process of construction ,equipment, component9) PVC 2 gang box, 1 gang box with no smell attracting to rent ,will no suffer from ...