This pack of two Berkey Authentic Black BB9-2 water replacement filters is perfect for your Berkey water system. Designed to remove bacteria and other contaminants from your water, these filters are compatible with Berkey Light, Big Berkey, and Imperial Berkey models. The carbon/charcoal filtration method ensures that your water is clean and fresh-tasting. Made in the United States, these filters are suitable for both commercial and household use. The black color adds a sleek touch to your Berkey system. Get clean and refreshing water with these high-quality filters.