Greene, Tweed & Co. is a leading, multinational manufacturer of specialty sealing elements and engineered plastics. Founded in 1863, the company's principal manufacturing operations are in Kulpsville and Hatfield, Pennsylvania; these plants have been certified to ISO 9001 standards. Markets served include aerospace and defense, industrial hydraulics, oilfield equipment, chemical processing, and semiconductor fabrication equipment manufacturing. Greene, Tweed's WRJ Series products (composites of carbon and VICTREX PEEK) exhibit outstanding wear and friction properties, high chemical resistance, and exceptional mechanical integrity, making them ideally suited for wear rings, bushings, and bearings.