HIPA Carburetor Repair Kits Gakset Diaphragm RB-66 for ZAMA STIHL BG75 FC55 FC75 FC85 FS46 FS55 FS75 FS80 FS85 FS4137 HL45 HL75 HS75 HS80 HS85 HT70 HT75 String Trimmer Replace manufacturer part number: RB-66 Fits ZAMA C1Q-S28 C1Q-S28A C1Q-S28B C1Q-S28C C1Q-S28D C1Q-S29 C1Q-S29A C1Q-S29B C1Q-S29C C1Q-S30 C1Q-S30A C1Q-S30B C1Q-S30C C1Q-S41 C1Q-S44 C1Q-S44A C1Q-S45 C1Q-S28E C1Q-S29D STIHL string trimmer: BG75 FC55 FC75 FC85 FS46 FS55 FS75 FS80 FS85 FS4137 HL45 HL75 HS75 HS80 HS85 HT70 HT75