Used on Zama Carburetors: C1U-H46, C1U-H46A & C1U-H49.This carb was used on some of these:  Homelite:  C300, BC800, BC900, BC1200, BC1600, BC2500AZ,F2040, HRT1240GRyobi: RY70103, RY70103A, RY70105, RY70105A, RY70107, RY70107A