K&N's Universal Air Filters are designed and manufactured for a wide variety of applications, including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications. Regardless of the angle or offset diameter of the air intake, there is probably a K&N Universal air filter for your equipment. All filters are constructed with ultra-strong moulded pliable rubber flanges that absorb vibration and allow for secure attachment and can also be stretched for up to 1/16 of an inch (1.5mm) to fit in-between sizes. K&N universal air filters are washable and reusable. Features: Designed to increase horsepower and acceleration. Hundreds of sizes and shapes for most applications. High air flow with excellent filtration. Clamp-on washable and reusable air filter. Malleable flanges. Specifications: Ai r Filter Shape: Round Tapered Washable: Yes Air Filter Material: Cotton Gauze Flange Type: Centered Flange Inside Diameter: 70 mm (2.75 in) Top Style: Rubber Top Material: Rubber Top Outside Diameter: 114 mm (4.5 in) Height: 127 mm (5 in) Flange Length: 19 mm (0.75 in) Flanges: 1 Base Outside Diameter: 149 mm (5.875 in) Air Filter Large End Diameter: 149 mm (5.875 in) Weight: 1.2 lb (0.5 kg) Filter Re-Oiling Amount: 39 ml (1.33 oz)