Cylinder Assembly / Husqvarna 503 86 99-71Pack Size:1Husqvarna 503 86 99-03, Husqvarna 503 86 99-71, Husqvarna 503 86 99-01, Husqvarna 503 89 99-71, Husqvarna 537 09 58-71Ahlborn PS350, HL Supply H30351Husqvarna 340, 345, 350 and 351 chainsawsBore: 44 mm, Coating: Chrome, Includes: Piston, ring, pin and clips, Ethanol: Not compatible with greater than 10% ethanol fuel