Radial Ball Bearing Bearing Industry Number 1621 Bore Diameter 1/2 in Closure Double Sealed For Environment Chemical Food and Beverage Pharmaceutical Poultry Outer Ring Width 0.437 in Outside Diameter 1 3/8 in Ring Material Stainless Steel Seal Type Contact System of Measurement Inch Cage Material Stainless Steel ABEC Rating 1 Ball Material Stainless Steel Bore Diameter Tolerance +0/-0.0003 in Cage Material Grade 304 Dynamic Radial Load Capacity 1 175 lbf