JRL 38mm Air Filter For 110cc 125cc ATV Quad Pit Dirt Trail Monkey Bike 50cc Scooter Fit:Angle 37mm 38mm 39mm Foam Air Filter Cleaner Fit PIT PRO PIT Bike Trail Bike Dirt Bike Thumpstar Packae Include:1*Air Filter Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Note: Please double check before you make order, thank you.