Cylinder Assembly / Stihl 1130 020 1207Pack Size:1Stihl 1130 020 1207, Stihl 1130 020 1204Bailey's RSM 60 00 517, HL Supply H30170Stihl 017 and MS170 chainsawsBore: 37 mm, Includes: Piston, rings, pin and clips, Ethanol: Not compatible with greater than 10% ethanol fuel