... Double Throw 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 ... better quality.knife switch packing list modelspecificationpcs/ ...