Chrome Piston Ring Std / Kohler 235287-SPack Size:1Gravely 010857, Kohler 235287, Kohler 235287-SESF 163-301, Foley/Belsaw 5977068, Foley/PLP 163-301, Green Meadow R212, Laser L5608, Laser 94002, NHC 266-9737, Oregon 36-031, Prime Line 7-03751, Rotary 2471, Sunbelt SB-2471Gravely K241; Kohler K241Cylinder Diameter: 3.251 ", Ethanol: Not compatible with greater than 10% ethanol fuel