GAC Activated carbon filter cartridge Aqua Best CTO filter cartridge is made of shell carbon and coal activated carbon, supplemented with edible adhesive, using high-tech and processed special technology, which combines adsorption, filtration, interception, catalytic role in the one. It can effectively remove the organic matter, chlorine, the radioactive substances, colored substance, odors in water. It is an ideal new generation product in the Water purification & Filtration industry. Best Water Filter Solutionto get Pure Drinking Water.