Comes with two sheets of gasket material - 11.5” wide x 15.5” long. Material is premium compressed sheet, manufactured with aramid and other synthetic fibers and uses an NBR (Nitrile Butadiene Rubber) binder. Flexible, easy to use, trace and cut with scissors or razor knife. Resistant to: oils, solvents, fuels, mild acids and alkalis, water, low pressure steam, air and other gases. Recommended applications to seal: engine case side covers, valve covers, base and cylinder, transmissions, drive line components, water pumps, thermostats, fuel pumps, oil line and hose flanges. Has favorable properties for high heat insulation and exhaust mount insulation. Service conditions up to 750°F.