Indicator silica gel adsorbent KC drying beads for moisture control. Spherical silica gel with very high mechanical strength. Free of heavy metal and eco-friendly. A very good visual changing of colour guarantees a clear moisture indication. The level of the moisture absorption is indicated by a change of colour from orange to colourless with an approx. 6 % w/w water content. Even afterwards, the drying beads adsorb water until reaching the maximum absorption capacity. They can be dried again in the drying cabinet with 130°C to 160°C and are then usable again. Grain size: 2 to 5 mm