The Pentek 150070 20-inch BlackBlue Standard Filter Housing 8 Pack is a set of water filter housings designed for use in a reverse osmosis filtration system. These filter housings are specifically designed for Pentek brand filters and are ideal for removing impurities and contaminants from water. With a sleek black and blue design, these housings are durable and designed to last. The 8 pack ensures that you have an ample supply of filter housings on hand for regular maintenance and replacement of old or worn out housings. Perfect for keeping your water clean and pure.