Replacing the filter cartridge in your system is of the utmost importance to keeping it working properly. The RF-1003 Compatible replacement 0.5 Micron Carbon Block Cartridge is designed to be a cost effective maintenance solution that is highly effective at eliminating foul odors and enhancing the taste of drinking water. Made from organic coconut shells, this activated carbon block captures sediment up to .5 microns and is capable of eliminating a number of chemicals from the water supply. Compatible models include: Royal Prestige Infinity Lumina. Infinity 1 under counter system. WF0705. FrescaPure 4000 under counter system. FrescaPure 4500 under counter system. FrescaPure 5000 under counter system. FrescaPure 6000 CT. FrescaPure 6000 UC. This filter is NOT compatible with the FrescaPure 3000 or 3500 models. Specifications: Rating: 0.5 micron Thread: 1/4" Thread Diameter: 4.5 Diameter Filter Media: Coconut shell activated carbon. Made with High-Quality Certified Coconut Shell Carbon, this filter provides filtration down to 0.5 sub-microns and is designed to provide 750 gallons of clean, safe, healthy, great-tasting drinking water. The CB6 cartridge filters and reduces: Free Chlorine, Taste and Odor, Chloramine, Lead, Cysts, VOCs, Organic Compounds, Pesticides, MTBE, Asbestos, Mercury, Sediment, Iron, and many other organic contaminants. Specs: 1/4" inch NPT Port. Polypropylene outer layer for reduction of sediment and other particulates. Certified high quality coconut activate carbon block. Flow Rate: 0.75 gpm. Micron Rating: 0.5 submicron filtration. Capacity: 750 gallons or 6 - 12 months (1 year). Temperature Rating: 33 - 100 F. Size: 4.5" D x 6.5" H. Additional Details ------------------------------ Product description: Replacing the filter cartridge in your system is of the utmost importance to keeping it working properly. The RF-1003 Compatible replacement 0.5 Micron Carbon Block Cartridge is designed to be a cost effective maintenance solution that is highly effective at eliminating foul odors and enhancing the taste of drinking water. Made from organic coconut shells, this activated carbon block captures sediment up to .5 microns and is capable of eliminating a number of chemicals from the water supply. Compatible models include: Royal Prestige Infinity Lumina. Infinity 1 under counter system. WF0705. FrescaPure 4000 under counter system. FrescaPure 4500 under counter system. FrescaPure 5000 under counter system. FrescaPure 6000 CT. FrescaPure 6000 UC. This filter is NOT compatible with the FrescaPure 3000 or 3500 models. Specifications: Rating: 0.5 micron Thread: 1/4" Thread Diameter: 4.5 Diameter Filter Media: Coconut shell activated carbon. Made with High-Quality Certified Coconut Shell Carbon, this filter provides filtration down to 0.5 sub-microns and is designed to provide 750 gallons of clean, safe, healthy, great-tasting drinking water. The CB6 cartridge filters and reduces: Free Chlorine, Taste and Odor, Chloramine, Lead, Cysts, VOCs, Organic Compounds, Pesticides, MTBE, Asbestos, Mercury, Sediment, Iron, and many other organic contaminants. Specs: 1/4" inch NPT Port. Polypropylene outer layer for reduction of sediment and other particulates. Certified high quality coconut activate carbon block. Flow Rate: 0.75 gpm. Micron Rating: 0.5 submicron filtration. Capacity: 750 gallons or 6 - 12 months (1 year). Temperature Rating: 33 - 100 F. Size: 4.5" D x 6.5" H.