10 inch CFB-PB10 filter cartridge. PENTEK(tm) filter cartridges are designed to fit all standard brand filter housings, they are made with only Premium filtration media. This lead sorbent carbon block cartridge uses FIBERDYNE(tm) technology to reduce cysts, lead, giardia, chlorine, taste, odor and sediment with minimal pressure drop. Filters up to 5,000 gallons with a flow rate of 1 GPM.