Product Details: The Pelican Worldwide Betts™ NBR Compatible Manhole Gasket is the perfect solution for ensuring a reliable and tight seal, preventing leaks and contamination. Made from nitrile butadiene rubber, these gaskets are resistant to oils, fuels, water and a range of chemicals, ensuring reliable sealing. The gasket is designed to fit most manhole covers and is easy to install. FleetPride is your First Click in Heavy Duty®.