This is 1 complete standard size piston rings sets! So enough for 1  engine on these single cylinder models.  This is a new in the package Piston Ring set for the  1973 1974 1975 1976 1977 1978 Honda XL175. This is a standard size (STD) ring set correct replacement for part #13011-287-010.  This has the 2 compression rings and the lower oil control rings for both 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 AHRMA racing these cool bikes.