1.all kinds of switch box ,junction box , 2.sizes: 3"x3" ,3"x6"20mm/ 25mm ... flushing box,surface box,wall box , cable box ,junction box 2) sizes: 3"x3",3"x6"box, 20mm ... no suffer from biotic attack10) Protects wire and cable from easy damage11) Installation during the process of ... construction ,electrical equipment , components12)PVC 2 gang box are used as surface mounting ,control ...