... Usage: various relays,contactors,small switches and temp-controllers Rivet contact of copper and silverMain Materials:We can provide you the ... stain, tearing, deformation,scratches and other defects on the surface of rivet contact, and no copper exposed or visible.2. No ... stratification, burr, sripe,pit etc in the side of rivet head3. no liable to oxidization on its surface4. high level ...