Bearing No. Boundary Dimensions(mm) d D C B NATV12PP 12 32 14 15 NATV15PP 15 35 18 19 NATV17PP 17 40 20 21 NATV20PP 20 47 24 25 NATV25PP 25 52 24 25 NATV30PP 30 62 28 29 NATV35PP 35 72 28 29 NATV40PP 40 80 30 32 NATV45PP 45 85 30 32 NATV50PP 50 90 30 32