all kinds of switch box ,control box ,junction box ,pipe fittings sizes: 3"x3" ,3"x6" , 20mm/ 25mm color ... depoist3)Port : SHUNDEFeatures:1)No rust occurs like metal pipe ,switch box with no smell attracting rotent ,will no ... to equipment ,long life for use5)other sizes on special order are available6)plastic control box are used as ... process of construction ,equipment, component 2010 hot pipe fittings