This is a new in the package Piston Rings set (1 set of rings for all 3 pistons!) for the 1972-1980 S1 and KH250 Kawasaki 250 Triple cylinder 2-Stroke motorcycles.  These are standard size (STD) rings set which is correct replacement for 45mm Standard bore pistons.   Correct replacement for #13008-003.    Each of the 4 rings sets has the 2 compression rings and the lower 3pc oil control rings for the pistons, everything to get your pistons/ engine running nicely again.   Get your old bike up and running again. We only sell the best! This is a top-quality aftermarket item shipped new in the package.  Good stuff if you are riding or restoring or  racing these cool bikes. We also have complete gasket set for these bikes if you may need too.