3S KOREA Co., Ltd. engages in the manufacture and sale of semiconductor wafer carrier and environment test equipment. It operates through the Environment Test Equipment and Wafer Carrier business divisions. The Environment Test Equipment business provides calorimeter and environment control system. The Wafer Carrier business offers front opening shipping box, front opening unified pod and open cassette. The company was founded on January 28, 1991 and is headquartered in Seoul, South Korea.