Orange Silica Gel is a heavy metal free, environmental-friendly humidity indicator silica gel for protection of goods and miscellaneous substances widely used in transformer breathers & air dryer in power sector. Orange Silica Gel is an alumino-silicate gel in the form of hard round shape or spherical beads form, with a very high resistance to crushing and a low attrition rate. Orange Silica Gel has a longer life than most other adsorbents. Orange Silica Gel has very high mechanical integrity.