The Aqua Solutions Aqua-50 Reverse Osmosis Water Filtration System is a 4-stage under sink water filtration system that removes up to 99% of contaminants. It has a 3.2 gallon per day production rate and includes a lead-free brushed nickel faucet. The 4 filtration stages include sediment, carbon block, reverse osmosis, and carbon block post filters. The system is easy to install and maintain. It comes with necessary tubing, fittings, mounting bracket and installation guide. The filters should be replaced every 6-12 months for optimal performance. The Aqua-50 effectively improves water taste, odor and appearance.