Cylinder Assembly / Stihl 4238 020 1202Pack Size:1Stihl 4238 020 1202HL Supply H30410-N, Rotary 12731Stihl TS410 and TS420 Cutquik SawsBore: 50 mm, Coating: Ceramic, Includes: Piston, rings, pin and clips, Ethanol: Not compatible with greater than 10% ethanol fuel