Chrome steel, Hardness HRC 61 to 64; P0, P6 and P5 quality; Z1V1 or Z2V2. Bearing No.BoreOuter DiameterWidthRadiusOPENmmmmmmmm6833720.1684492.50.168551130.156866133.50.156877143.50.1568881640.268991740.26800101950.36800W7101970.36801122150.36802152450.36803172650.36804203270.36805253770.36806304270.36807354770.36808405270.36809455870.36810506570.3