Bearing Pulley, Sliding Window Rollers, Machining Hardware manufacturer / supplier in China, offering U-Shaped Pulley with Steel Customized OEM Supports 625zz 626zz 627zz 608zz Pulley Wheels with Bearings for Slide Door, POM Nylon Plastic Pulley F-Shape Groove Wheel 625zz 626zz 627zz 608zz 6100zz Bearing Pulley Rail Ball Wheel Sliding Door, V Type Shower Roller Wheel Plastic Door Pulley Shaft Sliding Roller Nylon Wheel for Bathroom and so on.