electrode cap: 1.used in spot welding 2. material CuCr(C18200),CuCrZr(C18150), CuZr(C15000) and so on 3.the product has passed authentication of ISO9001:2000 certificate 4. can produce according to drawings We have a history of more than 27years.Its quality and price is very good. The products have been exported to many countries all over the world.