Dongguan One Step Packing Material Co., Ltd. was established in 2006 year, a factory specializes in Humidity Indicator Card, Humidity Indicator Plug and Desiccant in China.One Steps packing material can be widely used in printed circuit board, LED, semiconductor, various aeronautic and military equipment. It is an available way to quantify relative humidity levels in sealed packaging, and protects the product and equipment from the deleterious effects of humidity.