... contact.customer should provide product drawing or sample. The contact material: Ag, FAg, AgNi, AgZnO, AgCuO, AgCdO, AgSnO2, AgC, AgW, AgWC ... /Cu, AgZnO/Cu, AgCdO/Cu, AgSnO2/Cu,etc. The base material: Red Copper,Brass, phosphorous bronze,etc. The useful: Widely used ...