836100M91 New Piston Ring Set Made to fit Allis Chalmers Tractor Models B C CA + One New Aftermarket Replacement Piston Ring Set Set Includes Six Total Pieces: (1) Top Rings (.123"), (2) 2nd and 3rd Ring (.1235") And (3) Oil Rings (.1825") Replaces: PRS135 ,230093 ,835844M91 ,70230093 ,A1486562 ,A 1486562 ,APR122 ,A-PR122