Fuel Cap / Homelite A 00982 BPack Size:1Homelite A 00982 B, Homelite BA 00099, Homelite A 00982 A, Homelite DA-00099-AESF 139-545, Green Meadow GC115, Kwik-Fix 839803, Laser 88005, Laser L3186, NHC 264-6689, Oregon 55-124, Rotary 9652John Deere ST series trimmersOD: 1 1/2 ", Ethanol: Not compatible with greater than 10% ethanol fuel