HIPA Carburetor with 2 Primer Bulb for STIHL FS38 FS45 FS45C FS45L FS46 FS55 FS55C FS55T FS55R FS55RC KM55 HL45 KM55R FC55 String Trimmer Replacement manufacturer part number: 4140 120 0619 ZAMA C1Q-S66 C1Q-S71 C1Q-S97 A C1Q-S143 C1Q-S153 C1Q-S186 C1Q-S186A C1Q-S186B carburetor Fitment models: STIHL KM55 HL45 KM55R FS38 FS45 FS46 FS55 FS55R FS55RC FS45C FS45L FS55C FS55T FC55 string trimmer Package include: 1pc carburetor, 2pcs primer bulb