... 4.Top quality ,low price porcelain knife switch1. Product: Double throw 2 pole porcelain kinfe switch 100A Voltage110~600V Current100A MaterialBody ... model number 2P20A,2P30A,2P60A,2P100A3P20A,3P30A,3P60A,3P100A Double throw 2 pole 100A porcelain knife switch