Leak-resistant for maximum performanceCrack-resistant for long-lasting useEasy to install; just press it into placeNo special tools required for installationProvide an airtight seal for the PCV valve with Dorman resilient PCV Grommet. Made from oil-resistant rubber, the grommet is durable against severe heat and fluctuating under hood temperatures. Its beveled design helps ensure a secure fit. It is excellent for the repair of emission and vacuum systems on cars, trucks and tractors.