This is a replacement MIP "Pucks" TLR Thrust Rebuild Kit. This rebuild kit is made in America, CNC machined by MIP for the highest precision and quality. The components are compatible with the MIP 22SCT (MIP13145), 22T (MIP13150), and 22 (MIP13155) Pucks Systems. Package includes diff rings, diff balls, thrust bearing components, diff springs, diff screws and t-nuts, as well as a container of MIP grease.