General description This AlwaysH Carburetor Kit is designed for various STIHL models, including FS55, FS55R, FS55RC, FS38, KM55, and HL45. It includes essential components for maintaining optimal performance in your string trimmers and hedge trimmers. Technical specifications Contents: 1 carburetor, 1 spark plug, 1 air filter, 1 fuel filter, 1 fuel line, 2 gaskets, 2 primers, 2 valves Compatible with STIHL part numbers: 4140 120 0612, 4140 120 0619 Carburetor models: C1Q-S97, C1Q-S186, C1Q-S186A, C1Q-S186B, C1Q-S66, C1Q-S71, C1Q-S97A, C1Q-S143, C1Q-S153 New model carburetor (post-2013-2015) features double-layer air intake and Z-shaped inverted design for the cable wheel Compatibility and accessories Fits STIHL FS45, FS38, FS55, FS55R, FS55RC, FS55C, FS55T, FS55Z, FS55DZ, FS55CE, FS55RCE, FS55RDZ, FS55RZ, FS55CEZ, FS55CEDZ, FS45C, FS46, FS46C, FS46CE, FS46CEZ, FS46DZ, FS46Z Compatible with STIHL HS45, HL45, HL45Z, HL45DZ hedge trimmers Fits STIHL KM55, KM55R, KM55RC, KM55C, KM55CE,