Bearing Pulley, Sliding Window Rollers, Machining Hardware manufacturer / supplier in China, offering R-Groove Bearing Plastic Pulley R0518-6 Nylon POM Plastic Drive Pulley Wheel Bearing with Rubber Coating Custom Cutting Service, OEM/ODM U-Groove Bearing Pulley U0415-6 604zz PA Rubber Coated Bearing Door and Window Movable Pulley Sliding Door Roller, Premium R0523-7 Rubber Bearing Plastic Pulley for Doors and Windows and so on.