" Use Desiccant Pack in Moisture Barrier Bags to absorb moisture Provides protection for moisture sensitive electronics (such as SMT – Surface Mount Technology); Best practice is to use with a Humidity Indicator Card; See Selection Chart HERE Desiccant is secured in economical, brown kraft paper pouches Recommended amount of desiccant is dependent on the interior surface area of the bag to be used, see EIA-583, Table 1; our Desiccant Calculator will help you estimate how much desiccant your application requires Can be baked and re-used No hazardous substances; see RoHS 3, REACH, Toxics in Packaging Statement Not recommended for use in clean rooms Made in North America "