Style 90 couplings and fittings 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. Couplings, reducing couplings, ells, and adapters are available from 1/2″ thru 2″ sizes in both conductive and insulating designs. Style 90 compression fittings are shipped assembled and ready-to-use.