The Omnipure K5520-JJ has a 1 year/1000 gallon capacity and a flow rate of 0.5 gpm.The Omnipure K5520-JJ 1 Mic. Carbon Block Filter Cartridge is a 2.5" x 10" filter that removes sediment, dirt, and rust particles to a 1 micron level and removes chlorine to improve taste and odor. The Omnipure K5520-JJ features a quick-connect 1/4" FQC.