CYLINDRICAL BOBS — STANDARD SIZES PRODUCT CODEDIAFACEMANDRELAT – 0011/2″1/2″1/8″AT – 0021/2″3/4″1/8″AT – 0031/2″1″1/8″AT – 0043/4″3/4″1/8″AT – 0053/4″11/8″AT – 0061″11/8″AT – 0071″1/2″1/8″AT – 0081″1/2″1/8″AT – 0091″1/2″1/8″AT – 0101″1/2″1/8″AT – 0111″21/8″