iSpring RCW5 - Legendary 50GPD 5-Stage Under-Counter Reverse Osmosis RO Water Filter with Quick Fitting Top-quality 5-Stage 50 Gallons per Day (GPD) Complete RO system No electricity is required; All filters and membrane are standard 10" size Free upgrade to Single-handle Chrome Faucet 100% wet tested before shipping for any leak Removes up to 98-percent of chemicals, heavy metals, sediment, Chlorine, fluoride, bacteria, virus and 100+ contaminants