Cylinder Assembly / Stihl 1127 020 1217Pack Size:1Stihl 1127 020 1217, Stihl 1127 020 1210Ahlborn PS290, HL Supply H30290Stihl 029, MS290 chain sawsBore: 46 mm, Coating: Chrome, Includes: Piston, rings, pin and clips, Ethanol: Not compatible with greater than 10% ethanol fuel