1.10years manufacture experience 2.High quality,low cost,professional service. 3.Do product according to customer's drawing. We make silver contact.customer should provide product drawing or sample. The contact material: Ag, FAg, AgNi, AgZnO, AgCuO, AgCdO, AgSnO2, AgC, AgW, AgWC, Ag/Cu, FAg/Cu, AgNi/Cu, AgZnO/Cu, AgCdO/Cu, AgSnO2/Cu,etc. The base material: Red Copper,Brass, phosphorous bronze,etc ...