These are, Activated Charcoal Granules, a pioneer product, which is used mostly in RO or water treatment systems. Activated charcoal is fine, odorless, and black in appearance, and it aids in water treatment, by filtering impurities along with making the odor of water better. These granules are produced by heating the wood, until it turns black, which further has natural properties of water purification. The Activated Charcoal Granules served by us are always earning praise in terms of quality, and are never disappointing any of the customers.