U-Joints are cold forged from SCM-415 steel, precision ground journals are case hardened to HRC58-61U-Joints are pre-greased with hi-temp lithium complex 3 greaseBearing cups feature a Quad lip seal to keep contamination out & grease inCentrally located grease zero and grease channels in the bearing cup evenly distributes greaseKits include cap plug to eliminate grease zero for low clearance applications FITS THE FOLLOWING APPLICATIONS, ALSO SHOWS WHICH SHAFT/AXLE IT FITS:REFERENCES: (FRONT AXLE-1, FRONT SHAFT DIFF SIDE-2, FRONT SHAFT ENGINE SIDE-3, REAR SHAFT ENGINE SIDE-4, REAR SHAFT DIFFERENTIAL SIDE-5, REAR AXLE INNER-6, REAR AXLE OUTER-7.)KAWASAKIMule 2500 94-00 (ref. 6 & 7)Mule 2510 93-99 (ref. 1, 6, 7)Mule 2510 2000 (ref. 6 & 7)Mule 2520 93-00 (ref. 6 & 7)Mule 3000 01-08 (ref. 6 & 7)Mule 3010 01-08 (ref. 6 & 7) Mule 3020 01-03 (ref. 6 & 7)Mule 4000 09-15 (ref. 6 & 7)Mule 4010 09-15 (ref. 6 & 7)KRF750 Teryx 4 12-13 (ref. 2 & 3)KRF800 Teryx 14-15 (ref. 2 & 3)KRF800 Teryx 4 14-15 (ref. 2 & 3)Mule 2510 Diesel 00-02 (ref. 6 & 7)Mule 3010 Diesel 01-08 (ref. 6 & 7)Mule 4010 Diesel 09-13 (ref. 6 & 7)