K&N Universal Clamp On Filter mm) Base OD x 2 in (51 mm) Top OD - KNRU-2580Brand: K&NPart Number: KNRU-2580Description: 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 which absorb vibration and allow for secure attachment and can also be stretched for up to 1/16" (1.5mm) to fit in-between sizes. K&N universal air filters are washable and reusable. Part KNRU-2580 Product Specifications Product Style: Round Tapered Universal Air FilterAir Filter Shape: Round TaperedBase Outside Diameter: 3.125 in (79 mm)Top Outside Diameter: 2 in (51 mm)Flanges: 1Flange Inside Diameter: 2 in (51 mm)Flange Length: 0.625 in (16 mm)Flange Type: CenteredHeight: 3 in (76 mm)Filter Material: Cotton GauzeTop Style: RubberTop Material/Finish: NoneFilter Re-Oiling Amount: 0.22 oz (6 ml)Inner Wire: No