NN3015M2KC1NA P4 Nachi Cylindrical Roller Bearing Bronze Cage : Tapered Bore 75mm x 115mm x 30mm Made in Japan NN3015M2KC1NA P4 Nachi Cylindrical Roller Bearings, Steel Cage, Made in Japan, the NN3015M2KC1NA P4 inner diameter is 75mm, the NN3015M2KC1NA P4 outer diameter is 115mm, NN3015M2KC1NA P4 width is 30mm.