The item that I am selling is a great find!  This is a new in the package Piston Ring set the KZ200 models made in 1977 1978 1979.  This is a standard size (STD) ring set.  Correct for part # 13008-5005. This has the 2 compression rings and the lower 3 pc  oil control ring for the piston on these single cylinder models, 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.  That is it!