Additional Details ------------------------------ Product description: Clack Microline Original S7028 Carbon Block Water Filter reduces sediment down to 5 microns. The Microline Clack S-7028 water filter reduces reduces Chlorine, Taste and Odor and should be installed in Microline RO Systems prior to a TFC reverse osmosis membrane. Also known as the Microline Part # A1013475 and compatible with Pentek RS-21-CB5 and RS-21-CB5-EB. Use the Microline S-7028 filter with the TFC-4 Microline Reverse Osmosis Systems.