0.495" overall width 0.250" bore diameter bearing, ball, single row, radial, non-loading groove separator type:formed bronze snap over ring; radial runout of innier race:0.0012 max tir; radial runout outer race:0.0018 max tir; axial runout of inner race:0.0012 max tir; axial runout of outer race:0.0018 max tir 40b 4 point ball contact, split inner ring, separable