The Stihl cylinder and piston with a diameter of 35 mm (code 4134-020-1218) is an original spare part for Stihl FS 120, FS 120 R, FS 300 brushcutters and Stihl BT 120 C, BT 121 augers. It is sold together with the piston pin, piston rings, plastic screws, and MN rings