... box, 2 gang box , 1 gang box,flushing box,wall box2) sizes: 3"x3",3"x6"box, 20mm/25mm ... :1)No rust occurs like metal pipe ,gang box with no smell attracting rotent ,will no suffer from biotic ... ,equipment, component9) PVC 2 gang box, 1 gang box with no smell attracting to rent ,will no suffer from biotic ... packing 3x6 box , pvc material ,200pcs/outer packing good quality wall box with white color