Piston ring - 5444059-01 Spare part for chainsaw/brush cutter from the Husqvarna spare parts catalogSuitable for e.g.: Husqvarna 435/EHusqvarna 435/E IIHusqvarna 440/E IIHusqvarna 440E/Triobrake Husqvarna 135Husqvarna 140Replacing: 5444070-01, 544 40 70-01