Knife Switch(Switch.Power Knife Switch) 1.2P30AD.3P30AD.2P100AS and so on 2.porcelain body, 3.copper or iron metal parts Knife Switch(Switch.Power Knife Switch)1.3P100AD,single throw knife switch2.Material:porcelain body,the metal for the copper.iron or brass3.Voltage:110V to 600V4.Current:10A to 200A5.Packing:color box each,12pcs for a export standard carton.