... :switch box, 2 gang box , 1 gang box,flushing box,surface box, mounted box 2) sizes: 3"x3",3"x6"box, 20mm ... special order are available6)2 gang box are used as surface mounting control box , junction box or general service box7)switch ... gang box are used as surface mounting ,control box , switch box or general service box square 3x3 surface box/ cable box/mounted box