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C1Q-S138, C1Q-S139, C1Q-S48A, C1Q-S55, C1Q-S55A, C1Q-S58, C1Q-S58A, C1Q-S64, C1Q-S82, C1Q-S83,-
Fits Stihl models BG45, BG55, BG65, BG85, BR45, FC55, FS120, FS200, FS250, FS350, FS38, FS45, FS46, FS55, FS55RT, HL45, KM55, SH55, SH85-

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Part No. RB-89
OEM Part No: RB89, GND50