Additional Details ------------------------------ Bullet point: WHAT’S IN THE BOX: This filter set includes (x2) 5-micron carbon block filters made from coconut shell, (x1) 5-micron sediment filter, (x1) high-efficiency RO membrane, and (x1) 10" inline postfilter with granular activated carbon filter (GAC) and 3/8" quick connect. These water filter cartridges work together for advanced reverse osmosis water filtration, ensuring your water is clean, fresh, and purified for daily use. Perfect for your Watts 5 Stage RO System.