This part will fit the following Stihl Products

TS 410, TS 420, KM 55, KM 55 C, KM 55 R, KM 55 RC, FS 400, FS 450, FS 480, BT 120 C, FC 55, BT 120 C, BT 121, FC 55, FR 350, FR 450, FR 480, FR 480 C, FS 120, FS 120 R, FS 250, FS 250 R, FS 300, FS 350, FS 38, FS 45, FS 45 C, FS 45 L, FS 46, FS 46 C, FS 55, FS 55 C, FS 55 R, FS 55 RC, FS 55 T, FT 250, HL 45, HT 250, MM 55, MM 55 C, SP 200, TS 410, TS 420.