Bearing Pulley, Sliding Window Rollers, Machining Hardware manufacturer / supplier in China, offering Heavy-Duty Polyurethane Rubber-Coated Bearing U Groove Nylon Wheels Ball Bearing Roller Window Pulley Sliding, Professional Nylon Plastic Closet Wardrobe Wheel Glass Door Pulley Rubber-Coated Bearing Chrome Steel Roller, High-Quality POM Pok Plastic Non-Standard Bearing Roller Pulley for Smooth Sliding Doors and so on.