welding wheel: 1. mainly used in seam welding machine 2. material: CuCrZr(C18150), CuZr(C15000),CuBeNi(C17510),CuNi2SiCr(C18000). 3. size: asrequired or according to your drawings We are a profeesional factory for electrode alloy. We have 27years' experience. And this product has been exported to many countries allover the world.