K&N replacement air filters are washable and reusable and provide high air-flow with excellent filtration. Features Designed to provide increased horsepower and acceleration Pleated cotton media provides a large filtration area offering low restriction high-capacity and long service intervals Multiple layers of woven cotton gauze media offer excellent filtration Fits directly into OEM airbox with an application-specific sealing bead ensuring a precise fit No fuel management modifications are required to obtain increased performance Washable & reusable most are pre-oiled and ready to ride Specifications Filter Material: Cotton Gauze Flange Inside Diameter: 2.5in (64mm) Flange Length: 0.75in (19mm) Height: 6in (152mm) Outside Diameter: 5.563in (141mm) Washable: Yes Filter Re-Oiling Amount: 3.48oz (103ml) Fits: Polaris ACE 325 2015-2016 ACE 570 HD 2016 SPORTSMAN ACE 570 2015-2016