Piston Rings Std / Husqvarna 576 81 84-01Pack Size:1Husqvarna 576 81 84-01Husqvarna 362, 371, 372, 372 X-TORQ chain saws; 371 K, 375 K cutoff sawsCylinder Diameter: 50 mm, Ethanol: Not compatible with greater than 10% ethanol fuel, Packaged in reusable protective polycarbonate case