TAPERED CUP AND CONE SETS FOR BEARINGS: CONE/CUP NO: LM12749/LM12711, 1.81 A DIM, 0.61 B DIM, 0.86 CONE I.D.(Item Diameter), 156266 ID: 7/8" OD: 2 Bearing No: 1640-2RS Width: 1.81 B: 0.61