CB5 removes sediment, chlorine taste and odor, and organic contaminants from your water. It is also widely used and efficient in filtering out organic solvents. Our superior carbon block combines high performance and integrity with an exceptional cost-to-performance value. Its ideal use is in residential and commercial water purification systems as well as pre and post-RO systems. It has a long lifespan and a high adsorptive capacity and efficiency. Comes in the standard 10 inch carbon block.QMP America