Piston kit Features: Cylinder (mm): 35 compatible with: 40271116 Weight: 2 g Compatible for : Stihl BT 120 C, FS 300, BT 121, FS 120, FS 160 Models: FS 120, FS 160, FS 300, BT 120 C, BT 121 Part No.: 40271116 Original part number reference: 4134 030 2011 STIHL