K&N 1.75in Flange ID x 3in OD x 2.5in H Chrome Finish Rubber Base Crankcase Vent FilterK&N crankcase vent filters are perfect for racing applications, vintage cars or individuals who want to add some aesthetics to their classic carbureted engine. The 62 1480 crankcase vent filter has a K&N embossed chrome top with a rubber base. The 1 3 4 inch diameter rubber flange is designed to push on and clamp directly on to metal or plastic tubing where venting is needed. This air filter is constructed with non woven synthetic filter media so it