This is a new Piston Rings set for the now vintage RL250 Trials model from 1974 1975 1976 and also is correct for the 1980 DS250. This is for 1 standard size (STD) ring sets..so enough for 1 engine rebuild.   This is the correct replacement for 70mm Standard bore pistons. Correct replacement for part #12140-15012 and 12140-30010.    Everything to get your piston/ engine running nicely again.  Very helpful and hard  to find item!  Get your old bike up and running again. Top quality aftermarket item. We only sell the best!  Good stuff if you are riding or restoring or racing these cool bikes.