THIS KIT FITS FROM 1949-1951 3 5/16" BORE CONTENITAL ENGINE IN THE FERGUSON TE20 AND TO20 TRACTORS. THE KIT HAS THE WRIST PINS AND SNAP RINGS. IT ALSO HAS THE O-RINGS FOR THE SLEEVES BUT I THINK I WOULD GET NEW O-RINGS BECAUSE THESE ARE ORIGAINAL O-RING FROM THE KIT BACK IN THE 80'S. THIS KIT IS FROM NOS FROM TRACTOR SUPPLY. IF YOU HAVE ANY QUESTION CALL OR TEXT 620-786-1383.