Product description 48mm Black Foam Air Filter Clear for 172MM 250cc ATV Scooter Moped Features: This foam air filter has a 48mm inner diameter.It's detachable and washable. It will allow your motor bike to do deep breath and generate much more power. Specification: Color: Black Shape of Connector Rubber Pipe: Bent Measurements: Connector Inner Diameter:48mm Compatibility: Bike Model: Most 50cc 70cc 90cc 110cc ATV Dirt Pit Bike Motorcycle with 35mm Engine Inlet. Carburetor: 16mm PZ16 Carburetor, 19mm PZ19 Carburetor. Other engines and carburetors with 35mm inlet. Material: Connector Material: Rubber,We use best rubber to make the intake connector. Cleaner Material: Two Layers of Foam, washable and reusable. Spring Quality: There is a metal spring to holder the foam inside of it. Our spring is thick than other. Clamping Band Material: Stainless, never rust. Many other filter use cheap iro band. Professional installation is highly recommended (no instruction included) Package Included: 1x Air Filter 1x Clamping Band