EOPE 1130-020-1207 Cylinder piston assembly 37mm fits Stihl&reg; 017, MS170 Chainsaw Fits Stihl 017, MS170 Replace OEM:1130 020 1207 Includes: Cylinder, Piston, Wrist pin, Circlips, Rings 37 mm Cylinder and Piston Kit for chainsaw Please check the size for compatibility before ordering it