Universal 39mm Air Filter For Motorcycle Street Dirt Bikes Scooter Cruiser Chopper  Description:   100% Brand new   Reduce restriction from the air box and allow each cylinder to breathe on it's own by instaling this filter   This product is washable、 and can be re-oiled using the re-oil kit   Increase air flow、 add up 2-5 HP   Easy to install.   Specification:   Frange Inside Diameter : 39mm Overall Height: 3.3!#!amp!*!quot;\/85mm Outside Diameter at base: 3!#!amp!*!quot;\/74mm Outside Diameter at the top: 2!#!amp!*!quot;\/50mm    Fitment:   Universal fitment、 this product will fit on most brands Frange Inside Diameter is 39mm Motorcycles、 Street bikes、 Dirt bikes、 Scooters、 Cruisers、 Choppers   Package Included:   1 x Motorcycle air filter