Bearing Pulley, Sliding Window Rollers, Machining Hardware manufacturer / supplier in China, offering Nylon Plastic POM/Pok Customized V-Groove Roller Bearing Pulley Wheels for Sliding Doors and Door Furniture, Plastic Bearing 4*16*5mm Rower Wheel Spherical Plastic Pulley Low Rolling Resistance, 626 China Supplier Customized Miniature Plastic Nylon/POM Coated U Groove Silent Pulley Track Roller Wheel Bearing Roller Pulley U0622.5-7 and so on.