NN3024M2KC1NA P4 Nachi Cylindrical Roller Bearing Bronze Cage : Tapered Bore 120mm x 180mm x 46mm Made in Japan NN3024M2KC1NA P4 Nachi Cylindrical Roller Bearings, Steel Cage, Made in Japan, the NN3024M2KC1NA P4 inner diameter is 120mm, the NN3024M2KC1NA P4 outer diameter is 180mm, NN3024M2KC1NA P4 width is 46mm.