K&N rubber crankcase vent filters are designed to filter out blow by gases emitted from the crankcase eliminating the need to re-route them back into your cars intake. Designed for racing and trick enough for show cars (not for use on emission controlled vehicles) these K&N crankcase vent filters give your engine bay a nice added touch. Made with high-quality K&N filter element, rubber base and chrome top. Filters are designed to clamp directly to metal or plastic tubing. Breather is available in 1-3/8 in diameter and 1-1/8 in length or 2in in diameter and 1-1/2 inches high.