5pcs 17mm Round Groove Nylon Bearing Pulley Wheels Roller for 3mm Rope w/ 695ZZ Bearing Deep groove ball bearings, fashionable, slide flexible, compression wear. Suitable for furniture hardware accessories, mobile doors, glass sliding doors, aluminum doors Product Size: 5mm/0.2"(ID)*17mm/0.67"(OD)*6mm(Thickness), U groove Size: 3(wide)*1.5(deep) 695ZZ bearing size :5*13*4mm