Check the listing for details. Pentek CFB-Plus10BB Filter - 10" Big Blue Carbon Block Filter. Color: Blue, Condition: New. Listed at 47.46 USD. The Pentek CFB-Plus10BB Water Filter Cartridge Replacement is a 10-inch carbon block Big Blue water filter replacement for use in many water filter systems. It is an enhanced version of the Pentek CFB-10BB filter and offers superb chlorine and sediment reduction. The Pentek CFBPlus10BB is a large diameter Big Blue filter (4 1/2") which features a higher flow rate and reduces more chlorine and sediment than standard diameter (2 1/2") water filter cartridges. It also has a longer filter life compared to other similarly sized filter cartridges.This Pentek filter replacement cartridge uses advanced Fibredyne carbon block technology for up to two times the chlorine taste/odor reduction and dirt holding capacity of standard carbon block filters. It also reduces sediment, dirt, sand, rust, limescale, silt, and other particulates.