Fuel Cap / Briggs & Stratton 497929SPack Size:1Briggs & Stratton 497929, Briggs & Stratton 4132, Briggs & Stratton 497929S, Briggs & Stratton 5057H, Briggs & Stratton 5057KGreen Line 42164, Green Line 42159, Laser 97556, NHC 264-6154, Prime Line 7-04926, Rotary 9315Briggs & Stratton For 3.5 and 3.75 HP Classic and Sprint engines and 4 HP Quattro enginesID: 1 7/16 ", Not compatible with greater than 10% ethanol fuel