100% Brand New, High Performance Air Filter, Inside Diameter:38mm/1.5 inches 38mm Air Filter Compatible with Chinese GY6 50cc 90cc 110cc 125cc 150cc Motorcycle ATV Quad Dirt Pit Bike QMB139 Moped Scooter Apollo SSR Lifan Off Road XR50 CRF50 XR CRF Overall length of filters is 82mm, Overall width of filters is 75mm Compatible with most Off-road Motorcycle ATV Quad Dirt Pit Bike Easy to install, the universal air filter can be secured tightly onto your vehicle pipe, and you can adjust to required size with flat head screwdriver.Please Check The Size Before You Buy It. 38MM Air Filter Compatible For Models 49cc 50cc 70cc 90cc 110cc 125cc 150cc 200cc ATV Quad Dirt Pit Bike Gy6 Scooter Go Kart, etc. Design and material of air filter: 1.Turbofan Design??Designed with turbofan, which has high air flow & excellent filtration. 2.Air Filter Clamp: Easy to adjust to required size with flat head screwdriver. 3.Air Filter Mesh??Air filter mesh is made of activated carbon, cloth and mesh, help your engine to draw more cooler air. 4.High Quality: Made of high quality metal, cloth, plasticmaterials. 5.Professional electrostatic filling technology, the fiber has an electrostatic electret structure, and the extremely high surface charge density makes the filter material have high electrostatic dust removal efficiency, strong active capture ability, and can truly filter PM2.5 efficiently.