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 Height: 11.063in (281mm) Inside Diameter: 2.5in (64mm) Outside Diameter: 5in (127mm) Washable: Yes Flange Inside Diameter: 2.469in (63mm) Flange Length: 0.563in (14mm) Filter Re-Oiling Amount: 4.64oz (137ml) Fits: Polaris ACE 900 XC 2019 GENERAL 1000 EPS 2017-2018 GENERAL 1000 EPS DELUXE 2017-2021 GENERAL 1000 EPS PREMIUM 2017-2021 GENERAL 4 1000 EPS 2018-2020 RZR 900 EPS 2018-2020 RZR 900 EPS TRAIL 2017