Quick view Add to Wishlist PuraShield CPUM-500-CART Replacement cartridge for CPUM-500. Includes prefilter, molecular filtration (22bs), Puraward layer and HEPA final filter Replacement cartridge for CPUM-500. Includes prefilter, molecular filtration (22bs), Puraward layer and HEPA final filter REPLACE CARTRIDGE FILTER MSRP: $243.66 Add to Cart The item has been added Compare