AutoCut C26-2 Head Replacement Fits Stihl FS, KM, FR Series FS 50 55 56 70 80 85 86 89 FS 90 91 94 111 120 130 131 200 240 250 260 R; KM 55, 56, 85, 90, 94, 100, 110, 130+; FR 131, FR 410; FSA 130, FSA 90 R The spool has a 2.4 mm cutting line, suitable for cutting lines less than 2.7 mm, e.g.: 2.4 mm, 2.6 mm. Threaded mounting: M10 x 1 mm, Thread type: Left-hand thread Inexpensive trimmer head replaces Stihl AutoCut C26-2 PN: 40027102169 Please note that this trimmer head is not original.