Cylinder Assembly / Stihl 1122 020 1211Pack Size:1Stihl 1122 020 1211, Stihl 1122 020 1209Ahlborn PS066, Ahlborn FOR-6222, Ahlborn FOR-6107, HL Supply H30066Stihl 066 and MS660 chainsawsBore: 54 mm, Coating: Chrome, Includes: Piston, rings, pin and clips, Ethanol: Not compatible with greater than 10% ethanol fuel