Fuel Cap / Echo 13100455830Pack Size:1Echo 13100455730, Echo 13100440930, Echo 13100440630, Echo 13100455830, John Deere AM105998Green Line 42159, Green Meadow GC961, J. Thomas PE-403, NHC 207-7394, Oregon 55-122, Prime Line 7-04940, Rotary 9048, Rotary 7999, Sunbelt EC-28, Sunbelt B1EC28Echo GT1100, 2000, 2100, 2102, 2103, 2400, SRM 1500, 1501, 2100, 2300, 2301, 2400, 2500, 2501,2510, 3000, 3800, SRS2100, PE2400, PB1000, 1010, ES2000 and SHR2100OD: 1 3/4 ", Ethanol: Not compatible with greater than 10% ethanol fuel, Fits most trimmers equipped with Kioritz engines