Cylinder Assembly / Stihl 1128 020 1221Pack Size:1Stihl 1128 020 1221, Stihl 1128 020 1217Ahlborn PS046, HL Supply H30046Stihl 046 and MS460 chainsawsBore: 52 mm, Coating: Chrome, Includes: Piston, rings, pin and clips, Ethanol: Not compatible with greater than 10% ethanol fuel