K&N Filters RU-1045 Universal Clamp On Air FilterAir Filter Universal Clamp On Air Filter Universal Clamp On Air Filter; Round Tapered; Base OD 5. 5 in.; Top OD 4 in.; Flange ID 3. 5 in. L 1. 25 in.; H 8 in.; Centered; Rubber; SPECIFICATIONS: Air Filter Element Material: Cotton Gauze Air Filter Large End Diameter: 5. 500 in. (140mm) Automotive Item Grade: High Performance Base Outside Diameter: 5. 500 in. (140mm) Color: Red Filter Material: Cotton Gauze Filter Re Oiling Amount: 1. 59 oz (47 ml)