The Edelbrock Circle Track Breather is designed for high RPM, high performance circle track racing applications. The oiled-cotton, gauze and screen element has very low restriction and is washable. The top is chrome plated and engraved with the Edelbrock logo. These washable breathers are available in push-on style. The positive crankcase ventilation valve, grommets and breather tube is not available. It is made of steel and rubber at the top and base respectively.