Miniature Ball Bearing Bearing Industry Number 688 Bore Diameter 8 mm Closure Double Shielded Outer Ring Width 5 mm Outside Diameter 16 mm Ring Material Alloy Steel System of Measurement Metric ABEC Rating 1 Cage Type Shielded Dynamic Radial Load Capacity 283 lbf Flange Diameter Not Applicable Flange Thickness Not Applicable Flange Type Non-Flanged Includes Retaining Ring No Lubricant Material Multitemp Grease