... . Single throw/Double throw 2. 2P20A,2P30A,2P60A,2P100A,3P20A,3P30A,3P60,etc 3. ron/zinc alloy/copper Electric Double And Single Knife ... Switch1. porcelain knife switch,electrical switch,power knife switch2. Porcelain body3. Copper or iron metal ... reply! We will arrange everything for you. Electric double and single knife switch for low voltage