4 Pack Compatible for Flow-Pur 8 Carbon Block Filter Cartridge WCBCS-975-RV by C. Condition is «New». Shipped with USPS Priority Mail. About this item Affordable Compatible Flow-Pur 8 Carbon Block Filter Compatible Filters 4 of these high quality 5 Micron Carbon Filters Fits Flow-Pue 8 System Model WCBCS-975-RV Carbon Block Filters Remove Taste, Odor, and Water Impurities Excellent Water Filter Replacements