Stern Williams manufactures terrazzo service sinks, shower floors and cabinet packages. Terrazzo is a mixture of Portland cement and marble chips. Stern Williams' casting produces a minimum compressive strength of 3,000 psi. The company's product line consists of Single-Source shower cabinets with terrazzo floors; Serpentine institutional shower floors; Sussex shower floors with flanges on all sides; Trieste shower floors with a wide integral threshold; back outlet shower floors; Parian roll-in and transfer type shower floors with or without ramps; Cornaro, Corlow and Crescent 12" corner service sinks; and Serviceptor square or rectangular 12" service sinks. Stern Williams.