TWINCO is a supplier of vital relays and components, automatic train stops, impedance bonds, switch heater control cases, 110VDC switch machine rectifiers, AAR hardware components, and miscellaneous signal components including plastic tags and wire markers. TWINCO's company headquarters, engineering, marketing and manufacturing occupy a modern 50,000 square foot facility in Hauppauge, New York. As an ISO 9001/2000 certified company and with 40 years of proven experience serving the transportation industry, TWINCO understands customers' requirements and strives to provide them with quality products that meet or exceed their expectations. A wide variety of sophisticated technical disciplines are integrated within TWINCO to provide a broad spectrum of capabilities, including manufacturing engineering support for special projects.