Product Description The Culligan US-600A filtration system fits compactly and installs easily on a 3/8-inch cold water line under the counter for convenient access to filtered water from the existing kitchen faucet. The filter is designed with an integrated quick attach mounting bracket for added installation ease. The included D-20A cartridge, plastic tubing, and installation hardware provide you with everything you need to get your kitchen faucet running with cleaner filtered water for your food and drink. The slim design of the water filter system works well in tight spaces. From the Manufacturer The Culligan US-600A slim design of this undersink water filter unit works well in tight spaces. The water filter includes quick connect fittings and tubing hardware for quick and easy installation. The included Culligan D-20 cartridge provides clear, clean water for drinking or cooking. Compatible with multiple cartridges. The filter includes a 5 year warranty.