20 inch 8 stage filter system with one particulate filter, one 6 stage filter and one carbon block filteters. The 6 stage filter consist of 2 -1 micron particulate filters,activated carbon,ion exchange,KDF55,and KDF85. The 20 inch filter provide extended filter capacity. The filter system provide significant protection from pesticides, lead, odor, and V.O.C., as well as other contaminates. Suitable as a whole house filtration system. produces great water a minimal cost, very cost effective in providing in expensive pure water.