62-13801-1/4 inch clamp-on flangeChrome -plated steel top and black rubber baseClamps onto a vent tube or outletWashable and reusable filter mediaK&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 62-1380 crankcase vent filter has a black rubber top and base. The filter is 2-1/2 inches tall, 3 inches in outside diameter with a 1-1/4 inch inside diameter flange which is designed to clamp onto a vent tube or outlet. Constructed with a cotton filter media it can be cleaned and reused repeatedly. A 14.79 milliliter pillow-pack of air filter oil included.