Dfx-cb-10 diamond flow polyspun/carbon block. Pentek dfx series diamond flow cartridges are a unique, premium cartridge that utilizes several of the Pentair core competencies by merging technologies into one cartridge in order to bring customers a quality product. Diamond flow series cartridges offer the effective chlorine taste & odor reduction found in traditional Pentek carbon blocks, joined with the superior sediment reduction to resist premature plugging. These dual purpose cartridges are well-suited for a wide range of applications. Features: high dirt-holding capacity maximizes utilization of the carbon block chlorine taste & odor reduction combined with superior sediment reduction available in 10-micron ratings standard size fits most systems low pressure drop twice as resistant to particulate plugging than standard carbon blocks