Culligan Under Sink Water Filtration System is expertly designed to improve the quality of your tap water by reducing chlorine, unpleasant tastes, and odors right at your faucet. This system features a sleek slime-line design and quick connect fittings for hassle- installation. Included with the system is a D-20A cartridge that ensures cleaner, healthier water for drinking, cooking, and making ice. The filter has a long life of up to 12 months or 1,000 gallons and is intended for use with cold water only. It operates efficiently within water pressures of 30-125 PSI and temperatures ranging from 40° to 100°F. The package includes the D-20A cartridge, 3/8” plastic tubing, a SW-5A housing wrench, and detailed installation instructions to make setup straightforward. Model Number: US-600A