... or black 1) name:switch box, 2 gang box , 1 gang box,flushing box,surface box,wall box , cable box ,junction box 2) sizes: 3"x3 ... ",3"x6"box, 20mm/25mm knockouts3) material ... 2 gang box are used as surface mounting ,control box , switch box or general service box 2013 new type of pvc junction box ,cable box