Big Blue 20-inch Empty Cartridge Shell

The Big Blue 20" empty cartridge shell allows you to make your own custom whole house filter to treat exactly what you want in your water. Or, you can save money and refill it after the media is exhausted several times over. It includes the shell, seal, extra thick foam sediment pad, and shrink-wrap plastic sleeve that can be used to seal the filter for storage or resale. The filter measures 4.5-inch in diameter and 20-inch long and fits all standard 20-inch Big Blue housings. Cartridge will hold just under .2 cubic feet.