The Stihl cylinder with piston Diameter 40 mm (code 1145-020-1202) is an original spare part for Stihl MS 201 C-EM, MS 201 C-M, MS 201 TC-M chainsaws. Includes piston Diameter 40 mm, compression ring Diameter 40x1.2 mm, circlip 9x0.8, piston pin 9x5.6x23. MN