welding block,material can be CuCrZr(C18150), CuCr(C18200),CuZr(C15000),CuBeNi(C17510),CuNi2SiCr(C18000) and CuCrZr(C18150). welding block1. always used in resistance welding.2. material: CuCrZr(C18150), CuCr(C18200),CuZr(C15000),CuBeNi(C17510),CuNi2SiCr(C18000).3. size: as required. welding block