Compatible piston for STIHL brushcutter Made in Italy Models : FS120, FS220, FS280, FS350, FS450 From the drop-down menu you can select the correct piston for your model Model : FS 120 Diameter : 35 mm Outer pin diameter : 10 mm Pin length : 29 mm Pin internal diameter : 6 mm Code : 54.230.1697 FS 220 Diameter : 38 mm Outer pin diameter : 10 mm Pin length : 29 mm Pin internal diameter : 6 mm Code : 54. 230.1698 FS 280 Diameter : 40 mm Stud Outer Diameter : 10 mm Stud Length : 29 mm Stud Inner Diameter : 6 mm Code : 54.230.1694 FS 350 Diameter : 38 mm Stud Outer Diameter : 10 mm Stud Length : 29 mm Stud Inner Diameter : 6 mm Code : 54.230.1699 FS 450 Diameter : 42 mm Stud Outer Diameter : 10 mm Stud Length : 29 mm Stud Inner Diameter : 6 mm Code : 54.230.1689