9/16 inch clamp-on flangeWashable and reusableChrome -plated steel top and black rubber baseMounts directly onto rubber grommets in valve coversK&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 62-1220 crankcase vent filter has a K&N embossed chrome-plated steel top with a black rubber base. The filter is 2-1/8 inches tall, 2 inches in outside diameter with a 9/16 inch flange which is designed to push on to the existing rubber breather grommets. Constructed with a cotton filter media it can be cleaned and reused repeatedly. A 14.79 milliliter pillow-pack of air filter oil included.