Miniature Ball Bearing Bearing Industry Number 688 Bore Diameter 8 mm Closure Double Shielded For Environment Caustic Chemical Food and Beverage Pharmaceutical Poultry Outer Ring Width 5 mm Outside Diameter 16 mm Ring Material Stainless Steel System of Measurement Metric Cage Material Stainless Steel ABEC Rating 1 Cage Material Grade 304 Cage Type Shielded Dynamic Radial Load Capacity 170 lbf Flange Diameter Not Applicable Flange Thickness Not Applicable