Miniature Ball Bearing, Bearing Industry Number 188, Bore Diameter 1/4 in, Closure Double Shielded, For Environment Caustic, Chemical, Food and Beverage, Pharmaceutical, Poultry, Outer Ring Width 0.187 in, Outside Diameter 1/2 in, Ring Material Alloy Steel, System of Measurement Inch, Cage Material Stainless Steel, ABEC Rating 1, Cage Material Grade 304, Cage Type Shielded, Dynamic Radial Load Capacity 88 lbf, Flange Diameter Not Applicable, Flange Thickness Not Applicable