This is a new Piston Rings set for the now vintage GT750 Suzuki models .. The 750 Lemans. This is for 3  standard size (STD) ring sets..so enough for 1 engine rebuild.  These were the popular 2 stroke 750 models made  in 1972 1973 1974 1975 1976 1977. This is the correct replacement for 70mm Standard bore pistons. Correct replacement for part #12140-15012 and 12140-30010.    Everything to get your pistons/ 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.