The Pentek RFC-20 filter is a nominal 7 micron Radial Flow Carbon Water Filter Cartridge, The Pentek RFC-20 water filter cartridges produce healthier, better-tasting drinking water, The Pentek RFC-20 water filters provide effective chlorine taste and odor reduction (based on manufacturer"s internal testing), The unique design of the Pentek RFC-20 reduces carbon fines in filtered water, Ametek RFC-20 radial flow carbon cartridges are constructed with a 70-micron porous polyethylene outer shell and durable polypropylene end caps, The 2-3/4"" OD cartridges have a polypropylene core and the 4-1/2"" OD cartridges incorporate a spun polypropylene core, Sandwiched between the outer shell and the core is a bed of granular activated carbon (GAC), The unique radial flow design offers the benefits of granular activated carbon (GAC) filtration, such as low pressure drop, while at the same time significantly reducing the release of carbon fines commonly associated with GAC style cartridges, The Pentek RFC20 water filter cartridges are ideal point-of-entry (POE) and other high flow rate applications, Dimensions: 20"" x 2-3/4"" (508 mm x 70 mm), Micron Rating (Nominal): 7, Temperature Rating: 40F to 125F (4, 4 C to 51, 7C), Initial ?P (psi) Flow Rate (gpm): 0, 60 psi 2 gpm (0, 04 bar 7, 6 L/min), Chlorine Taste and Odor Reduction Flow Rate (gpm): >6,000 Gallons 2 gpm (22,700 liters 7, 6 L/min), SKU: CWD1930