1Wide Application: Motorbike air intake filter cleaner is replacement for Dax ST50 ST70, and suitable for most 38mm flex neck carburettor intake bores for monkey bike, scooter, motorcycle. 2Main Function: Motorcycle air filter is designed to increase horsepower and acceleration, washable and reusable, has a long service time. 3Excellent Performance: Motorcycle air cleaner has excellent filtration, high air flow, high filtering efficiency, stable performance and high reliability. 4Premium Material: Air intake filter cleaner is made of premium rubber and Abs, which is hardness, not easy to deform, sturdy and durable and has a long service life. 5Simple Installation: The installation is simple, direct replacement, no complicated operation is required, convenient for using, and save your time and energy.