0.25" x 0.5", 78 LB Static, 158 LB Dynamic, 440C Stainless Steel, ABEC-7, Single Row, Unshielded, Precision, Ball Bearing Ball Bearing Type Unshielded, Precision Bearing Series ABEC-7 Bore Diameter 0.25 in. Outer Diameter 0.5 in. Overall Width 0.196...