46.5mm Round Groove Nylon Pulley Wheels Roller for 6, 8 ,10mm Rope, with 608zz Bearing Deep groove ball bearings, fashionable, slide flexible, compression wear. Suitable for furniture hardware accessories, mobile doors, glass sliding doors, aluminum doors and w Product Size: 8mm(ID)*46.5mm(OD)*10.5mm(Thickness), U groove Size: 5mm(Width)*5mm(Depth)*36.5mm(diameter) Set of 5 pics !