It usually fits in 10-inch Water Filter housings in Pakistan. It contains no binders, agents, solvents, antistatic materials, or wetting agents. PPF5 Micron cartridges ensure quality and remove more contaminants, and fine particles from drinking water, such as sand, dirt, silt, and rust particles. Replace these cartridges every 3months depending on the water quality. In Islamabad, people use to change this cartridge after every 3 months for the great taste of water. CTO water filter cartridges are used in reverse osmosis systems and other water filtration systems, For the removal of Chlorine – Chemicals Bad tastes, and Odor from water, Dirt, Sediment Rust, and Algae. (GAC) is GAC 10" UDF Coconut shell Carbon Filter and a proven option to remove certain chemicals, particularly organic chemicals, from water. GAC filters also can be used to remove chemicals that give objectionable odors or tastes to water such as hydrogen sulfide (rotten eggs odor) or chlorine