... AgSnO2/Cu AgZnO/Cu Ag/Cu Quality Control:1. no oil,indentation, pit circle printed, needle stain, tearing, deformation,scratches and ... widely used in small and medium-sized current contactor,starter,temperature controller,switches,etc.undercurrent contact devices,microswitches and precision instrument.Dimension ... ±2≥10±0.2R±2 electric silver contact for switch,temperature controller etc