HIPA Air Filter / Cleaner for Husqvarna 51 55 55EPA 55 Rancher EPA Chainsaw # 503 89 81-01 (with Detailed Sizes) New high quality air filter / cleaner Repalcement Manufacturer part number: 503 89 81-01 Fitment models: Husqvarna 51 55 55EPA 55 Rancher EPA Chainsaw Qty: 2 x air filter Please check the sizes carefully