Check the listing for details. 4 Pack- 9.875" x 2.5" Coconut Shell Carbon Block Water Filter, Whole house & RO. Color: Gray, Condition: New. Listed at 34.99 USD. Block Activated Carbon Coconut Shell Water Filter Cartridge 5 Micron for RO & Standard 10” Housing WELL-MATCHED with WFPFC8002, WFPFC9001, WHCF-WHWC, WHEF-WHWC, FXWTC, SCWH-5 Product Description Keeps water fresh by reducing and removing iron, manganese, chlorine, hydrogen sulfide, herbicides, pesticides, and other industrial chemicals WELL-MATCHED Models of Cartridges: Watts Premier MAXETW-975, WCBCS975-RV, DuPont WFPFC8002 and WFPFC9001, SCWH-5, Tier1 EP5_10, Whirlpool WHA2BF5, Water Filter Tree WWC105, GE FXWTC, WFD WF-CB105, Culligan D-10A & D-10, EcoPure EPW2C, Aquaboon CTO, Purenex 5C, 4C, C-5M, Cornelius COR10B1, Neo-Pure CTO1-2510, COR10B5, KleenWater KWGE25RG and KW2510CB, WFDWC30001, Omnipure OMB934-5M, WFPFC9001, Everpure CG5-10, MatriKX 32-250-10-GREEN and E32-250-125-975, DEV9108-15, iSpring FC15 This filter is ideal for a standard Reverse Osmosis Water Filtration Unit or any type of Water Filtration Unit with a 10 inch housing This filter is wrapped and sealed and meets NSF (National Science Foundation) Standards and Regulations. Dimensions: 9.875 inches x 2.5 inches (25.7 cm x 6.35 cm) WELL-FIT FOLLOWING HOUSINGS AND REVERS OSMOSIS WATER FILTER SYSTEMS: DuPont WFPF38001C, WFPF13003B, Culligan WTR Filter HF-360A and HF-150A, American Plumber WC34-PR, Geekpure RO5-FH10, Hydronix HF3-10CLBK34, EcoPure EPW2; iSpring RCC7AK, Global Water RO-505, RO5DX, APEC ROES-50-A, SimPure RPWROKSN075HDB, Ronaqua LEPAC10676, RA-125-10D-PP-CTO, RA-US-2 When people say water filter, they most frequently mean a carbon filter of some variety, because since the Egyptians discovered that storing water in charcoal made it stay fresher and taste better, carbon has been a standard feature in water treatment. Its centuries of popularity attest to its effectiveness. The Standard Activated Carbon Block filters are made of fine coconut shell carbon. They remove odors, undesirable colors, and unpleasant tastes of many organic compounds. These filters also are effective in removing chemicals like iron, manganese, chlorine, and hydrogen sulfide from your water to name a few. By removing these unwanted byproducts, you can rest assured that you will have access to fresh and clean water. Since these filters are made of a finely packed carbon (forming a cylinder block), they offer a much finer filtration of suspended particles and dirt. Chlorine removal is what carbon is best at, and nothing else equals carbon's ability to remove chlorine. What is Activated Carbon Block? There are many types of carbon. Most filter carbon is manufactured from coal, but other substances like wood and nut shells are also used. Coconut shell carbon is becoming popular not only because it is made from a renewable resource but also because it produces very good tasting water and is particularly good at trihalomethane removal. Besides the physical absorption that the Activated Carbon Block filter can provide, it also filters the water via a chemical process. The Activated Carbon Block filter is positively charged, thus it is able to attract negatively charged particles such as: chlorine, benzine, and other volatile organic compounds, and prevent them from flowing out into your glass. Carbon is well known for its unique absorbing ability; just a pound of carbon is able to provide up 125 acres of filtering surface area.