Piston Ring Std / Honda 13010-ZE8-601Pack Size:1Honda 13010-ZE8-601NHC 266-9237Honda GX270, GX610, GX620, GXV610 and GXV620Cylinder Diameter: 77 mm, Ethanol: Not compatible with greater than 10% ethanol fuel, Honda code 3689585, Use with our 515-450 piston (for GX270 only)