Dresser’s Style 90 service fittings join steel pipe to steel pipe (seal only). They consist of a cast iron or forged steel body; two resilient, specially compounded gaskets; two steel, self-centering protective gasket retainer cups; and two heavy end nuts. They are made of a high grade iron or rugged steel, perfectly formed and rigidly inspected. A machined, wedge-shaped flare provides a perfect gasket seat and uniform pack at all points. The gasket itself is made of scientifically compounded rubber, designed to last the life of the pipe.