Amana Tool uses only the finest industrial quality precision ball bearings available. Bearings are double steel-shielded for extra rigidity and to inhibit dust. A special high-performance, high-temperature grease is used for maximum life., #47754, diameter (D) 1, application 45467., B .218 (7/32), D 15mm, 47754 Metric steel ball bearing guide 1 overall DIA x 15mm inner DIA x 7/32 height