Pur Water 3 Stage Horizontal Faucet Mount Faucet-mount water purifier; horizontal design mounts on standard faucets in minutes with no tools Stainless steel construction Includes faucet mount and 1 filter (good for 2-3 months) 2-1/4 by 2-1/4 by 4-1/2 inches; 5-year limited warranty Enjoy healthy, great-tasting water straight from the tap with this three-stage faucet-mounted system. The horizontal faucet mount installs on any standard faucet in minutes and without tools. Its ingenious space-saving design allows for convenient access to the sink, while a handy bypass function makes it easy to quickly switch to unfiltered water when washing dishes. A built-in Automatic Safety Monitor gauge indicates how much filter life is left and automatically shows when a replacement is needed. A filtration cartridge is included, providing advanced filtration in three stages. First, the microfilter reduces sediment, making it cleaner. Second, it reduces heavy metals (lead, mercury), chlorination by-products (TTHMs), agricultural pollutants (pesticides, herbicides), industrial pollutants (gasoline, additives), while retaining the beneficial fluoride in the water. Third, it filters the water over a bed of minerals, making it taste better. For best results, the filter should be changed every 100 gallons.