Chrome Piston Ring Std / Briggs & Stratton 392331Pack Size:1Briggs & Stratton 392331, Briggs & Stratton 281707ESF 163-057, Foley/Belsaw 5978230, Foley/PLP 163-057, Green Meadow R952, Laser 94208, NHC 266-9147, Oregon 36-022, Prime Line 7-03783, Rotary 5875, Rotary 1875, Sunbelt SB-5875, Sunbelt B1SB5875Briggs & Stratton 220400-222400, 252400-255700, 256700-259700, 280700-286700 and 28A700-28D700Cylinder Diameter: 3.4375 ", Ethanol: Not compatible with greater than 10% ethanol fuel