Piston ring - 5132849-01 Replacement part for chainsaw/brush cutter from the Husqvarna spare parts catalogSuitable for example: Husqvarna 439Husqvarna T435Husqvarna T540XP Mark IIIHusqvarna 540XP Mark IIIReplaces: 522642601, 5226426-01, 522 64 26-01