Features: Highly efficient 35mm air filter, it fits for most 50-110cc ATVs & Dirt Bikes & Pit Bike & Go Karts. Higher air flow than normal filter for maximum power. Race filters increase air flow by up to 25% over standard filters. It can catch impurities in air to prolong the engine life. Help to ensure better mileage and engine performance, add more horsepower. The air filter prevents abrasive particulate matter from entering the engine;cylinders to ultimately increase horsepower, torque and improve the gas mileage. Specifications: Material:Stainless Steel Size:Approx.3.5cm/1.38inches Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please check pictures and specifications for compatibility. Thanks for your understandings. Package includes: 1x Motorcycle Air Filter