This is the optional MIP Ball Diff Rebuild Kit for use on the Associated SC10, T4 and B4 Vehicles. FEATURES: Steel construction YOU WILL RECEIVE: Two Diff Rings Six 5/64" Thrust Balls Twelve 3/32" Thrust Balls Two Thrust Washers One Diff Spring One 2.25x23.5mm Cap Head Screw One T Nut One Thrust Cap REQUIREMENTS: Installation on the differential assembly cnh 10/15/09 ir/jxs &