Petter M 1.5HP piston ring set in standard size for engines operating on the 2, 7/8" bore size.
This set comprises of three rings 3/16" wide with radial depths of 1/8"
These rings are NOT ready to fit to the piston straight out of the box. You will need to gap the rings to suit the bore diameter and file the peg releifs on the ends of the rings.