Made in the USA, the Culligan D-40 undersink water filter replacement cartridge is a genuine OEM part that will reduce contaminants and impurities from your drinking water for up to 6 months. Built to reduce chlorine, asbestos, lead, mercury and more, this filter will ensure you serve only the cleanest and crispest tasting water. Fits easily into undersink water filtration systems that use 9-3/4 in. x 2-1/2 in. cartridges.