Have Passed CE certification and ISO9001:2000 and the pulley are mainly used in the steel industry, harbor, coal industry, power industry, cement industry, etc.Our pulley are made from high precision welding pipes and seamless tubes, steel plates and the body of the roller/idler and the bearing are welded as an integrated one by extrusion and argon guarantee welding, which make the rollers/idlers low resistance coefficient, long lifetime. The seal of our rollers/idlers are labyrinth seal, which make the rollers/idlers fine waterproof and dustproof.Besides we can manufacture the pulley according to the buyers requirements