... Porcelain Knife Switch 1.Single throw/Double throw 2.2P20A,2P30A,2P60A,2P100A,3P30A,3P60A,3P100A,3P2 FNK 2X20A Double Throw Porcelain ... Knife Switch1.Single throw/Double throw 2.2P20A,2P30A,2P60A,2P100A, ... 3P30A,3P60A,3P100A,3P200A 3.iron/zinc alloy/copper(Double/Singlethrow 2PX20A,2PX30A,2PX60A,2PX100A,2PX200A,3PX20A,3PX30A,3PX60A, ...