Thread diameter: 12 mm. Possible thread diameter from 2.4 mm to 3.3 mm. Compatible with Stihl FS160, FS220, FS280, FS290, FS300, FS310, FS350, FS 360, FS400, FS410, FS450, FS460, FS480. Replaces Autocut 46-2 (predecessor 40-2), 4003 710 2189. Scope of delivery: 1 spool of thread.