Check the listing for details. K&N 4" Universal Clamp On Oiled High Flow Red Air Filter Intake. Condition: New. Listed at 49.99 USD. K&N adjustable fitting Universal Air Filters are made with flange inserts which adjust the filter's flange to one of three inside flange diameters. The flange on these filters is made with ultra-strong molded pliable rubber which absorbs vibration and allows for secure attachment. K&N clamp-on universal air filters are washable and reusable. -Designed to increase horsepower and acceleration-Includes inserts to fit three different flange diameters-High air flow with excellent filtration-Clamp-on washable and reusable air filter SpecificationsAir Filter Type: OiledAir Filter Style: Conical flangedInlet Flange Inside Diameter (in.): 4.00Air Filter Length (in.): 5.50Air Filter Top Measurement: 4.750 in. diameterAir Filter Bottom Measurement: 6.000 in. diameterAir Filter End Cap Material: SteelAir Filter End Cap Color: ChromeFilter Material: Cotton gauzeFilter Color: RedQuantity: Sold individuallyNotes: Features a 1.125 in. long inlet flange.