STI (also known as Suzhou Sushi Testing Group, 苏州苏试试验集团股份有限公司) is a provider of mechanical environment testing equipment and climatic environment testing equipment. It offers electrodynamic shakers, climatic chambers, highly-accelerated life test and highly-accelerated stress screening chambers, hydraulic vibration testers, shock testers, and other products. The company caters to the automotive, aerospace, electronics, medical, and education sectors.