Miniature Ball Bearing Bearing Industry Number 681X Bore Diameter 1.5 mm Closure Double Shielded Outer Ring Width 2 mm Outside Diameter 4 mm Ring Material Stainless Steel System of Measurement Metric Cage Material Steel Cage Type Crown Dynamic Radial Load Capacity 112 N Fillet Radius 0.05 mm Finish Chrome Plated Flange Diameter 5 mm Flange Type Non-Flanged Includes Retaining Ring No Lubricant Material Grease