Letool10pcs U groove sliding door wheel 8x30x10mm POM caoted with 608zz bearing roller inner 8mm groove wheel (10) Deep groove ball bearings, fashionable, slide flexible, compression wear. 8mm(ID)*30mm(OD)*10mm(Thickness) Bearing Material: High Carbon Steel Carrying Capacity: Approx. 15kg Suitable for furniture hardware accessories, mobile doors, glass sliding doors, aluminum doors etc.