... ) iron,copper, zinc alloy 3)Safe usage, good quality & low factory Electrical Porcelain Knife Switch1.Specification:3P 100AD 600V 2.Material ... .3.Advantage:Safe usage, good quality ,timely delivey date, low factory price4.Carton Meas.:44*38*28(cm)5.Packing:1pc ... *22Double throw3P100A12PCS24/2244*38*28Double throw3020A4PCS24/2236*30*36 low factory price 3P30AS porcelain knife switch