Driak Round Groove Nylon Pulley U Groove Track Roller Bearing Pulley Small Wheels With Bearings,Double Shielde Bearing,5X8X32.5X10mm Nylon Pulley Wheel Bearing Round U Groove Slide Door Window Drive Pulley Suitable for furniture hardware accessories, mobile doors, glass sliding doors, aluminum doors and windows, shower pulleys and drawers, etc. 5pcs U Groove pulley Ball Bearing Deep groove ball bearings, fashionable, slide flexible, compression wear.