... gelCharacteristicsColor-Variable Silica Gel 1 In the form of spherical or irregularly-shaped grains, the gel is currently presented purple, orange ... or yellow.2 With silicon dioxide as the chief ingredient, the product performs all the functions of blue silica gel but does ... bag or 25kg drum, special packing as requirements China Type A blue silica gel size: 3-5mm, 4-6mm, etc for power transformers