Moroso 68792 Moroso Filtered Valve Cover Breather - Clamp-On - 1in ID - Black FinishMoroso 68792 Moroso Filtered Valve Cover Breather Clamp On 1in ID Black Finish Clamp On Breather, Black Clamps onto a 1" outside diameter tube, clamp included Fits Moroso Billet Alum. Vacuum Relief Valves Nos. 22633, 22636 and 22637 Provides maximum protection against dirt and airborne debris without restricting air flow Clamp included Cleanable and re usable: oil before use Not legal for sale or use on pollution controlled vehicles