Siam Syndicate Trading Company (SST) is an important link in the supply chain for infrastructure and construction projects in Thailand. The company supplies mechanical and electrical products used in infrastructure, waterworks, wastewater, and other construction projects, serving clients in both the public and private sectors. SST sells and services such mechanical products as steel pipes and fittings, automatic control valves, expansion joints, and sludge collector equipment. The company's electrical products include fire alarm and fire suppression systems, closed circuit TV systems, street lighting columns and poles, and interior and exterior lighting fixtures.