Feature●Inside Diameter: 4mm - Outside Diameter: 8mm - Width: 2mm●Inside Diameter: 4mm - Outside Diameter: 8mm - Width: 2mm●Bearing Material: Stainless Steel 440C, Ball Material: Stainless Steel 440C, ABEC#1/ISOP0●Enclosure: Open●Retainer Material: Stainless Steel, Radial Play: P25●RPM Grease: 56000, RPM Oil: 67000Description Stainless, Flanged, Open