HIPA Air Filter + Fuel Filter + Spark Plug + Fuel Line Hose for Husqvarna 51 55 55EPA 55 Rancher EPA Chainsaw Repalcement Manufacturer part number: air filter 503 89 81-01, fuel filter 503-443201 Fuel line hose: I.D x O.D 1/8" x 3/16", 2 feet long Fitment models: Husqvarna 51 55 55EPA 55 Rancher EPA Chainsaw Package include: 1 x air filter, 2 x fuel filter, 1 x spark plug, 1 fuel line hose Please check the air filter size carefully