3S KOREA Co., Ltd. is a Korea-based company mainly engaged in the manufacture of wafer carriers. The Company operates in two business segments: wafer carrier segment, which manufactures front-opening shipping boxes (FOSBs) used as transfer devices for semiconductor wafers, and freezing air conditioning (AC) segment, which provides calorimeters, including compressor calorimeters, automotive AC calorimeters, psychometric type AC calorimeters, air to air type heat exchanger calorimeters, balanced ambient room type calorimeters, automotive compressor calorimeters and others, and environment test equipment, including artificial environment test equipment, environment test equipment for room AC, housing all-weather type equipment, automotive wind tunnel type equipment and artificial snowfall apparatus, as well as related components.