For silica gel blue crystals just contact swambe chemicals. The silica gel available in blue crystals has the power to adsorb the moisture in the sealed containers, to reduce the humidity level inside the large containers or storage area, and to prevent the equipment and instruments from the corrosion. Visit our website at https://www.swambe.com/products/silica_gel_blue_crystals or call us on 9879203377 and get the detailed information.