This is a new Piston Rings set for the now vintage 500 Suzuki models .. T500  Titan and GT500 This is for 2  standard size (STD) ring sets..so enough for 1 engine rebuild.  These were the popular 2 stroke 500 models made  in 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977. This is the correct replacement for 70mm Standard bore pistons. These rings are for 70mm bore and measure 1.5mm thick each. Suzuki did use 2 different thickness over the production years..2.0mm and 1.5mm so please check what size the ones on your piston/ bike are.  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.