Miniature Ball Bearing Bearing Industry Number 604 Bore Diameter 4 mm Closure Double Shielded Outer Ring Width 4 mm Outside Diameter 12 mm Ring Material Stainless Steel System of Measurement Metric Cage Material Steel Cage Type Ribbon Dynamic Radial Load Capacity 959 N Fillet Radius 0.2 mm Finish Chrome Plated Flange Diameter 13.5 mm Flange Type Non-Flanged Includes Retaining Ring No Lubricant Material Grease