GOOFIT Air Filter Stack Carburetor Carb for 2 Stroke 47cc 49cc Mini ATV Quad Dirt Pocket Bike Manifold intake diameter: 13MM; Air filter Diameter: 44MM Fit for 43cc 47cc 49cc Mini Pocket Bike Quad Scooter Brush Cutter ATV Feature: make gasoline purer Material: Metal; Reliable quality, easy to install Reminder/Note:To ensure you purchase the correct product,please read the product description carefully or image size.thanks for your attention.if you have any issues or need any help,welcome to contact with us before or after your purchase.we will do our best to help you solve it