Check the listing for details. SULFUR MAGNET™ H2S Rotten-Egg-Odor ELIMINATING WATER FILTER CARTRIDGE UNIQUE #1. Color: White or black, Condition: New. Listed at 99.99 USD. 100% satisfaction with over 3,700 transactions!!!Stop the stink NOW!FINALLY, a replacement water filter cartridge for the entire home or business that ELIMINATES the ROTTEN-EGG-ODOR caused by hydrogen sulfide (H2S) poisonous gas contaminating your water. Well water, in particular, suffers from this toxic contamination as does the water in many rivers and streams. The media contained within this cartridge is the most concentrated sulfide ion absorbing media on earth and is patented. A carbon block filter with the same capacity would be at lease 50 times larger and very expensive. An oxidative type filter system would be very expensive to buy, install, and use lots of electricity. This is the WORLD'S FIRST and ONLY inexpensive whole house replacement filter cartridge that is GUARANTEED to remove the STINK OF SULFUR from at least 50,000 gallons of water containing 1 ppm of H2S when used as a POINT OF ENTRY (POE) filter (the first filter in your filtration system as the water enters your home) under conditions set by the NSF International POE intermittent 5 gallon per minute flow rate of pH 6.5 to pH 10.5 water. These are not currently in mass production, this is a prototype, and the manufacturer hopes the purchasers of this limited production will report about their satisfaction in use, and to social media. Discover inexpensive, odor-free, healthy water for yourself! City water generally has only traces of H2S because most municipalities remove the toxic H2S gas, but they then replace the smelly H2S with a different toxin called chlorine as an anti-microbial preservative. The Multifunctional Media contained inside this 10" cartridge is 100% VOC free, anti-microbial, and will remove many other bad ionic contaminants like traces of chlorine and many heavy metals when used with water that is not acidic. Test your water with Blue Litmus (include with your purchase) to determine suitability: if you dip the paper in your water and it stays blue, you are OK. If it turns red, don't use the filter; ship it back to us for a refund. We'll include some Blue Litmus test paper with your purchase so you can test your water first. Use this filter as well for cleaning air by pumping air through the filter housing containing the cartridge. It will also produce the cleanest hydrogen ever found on earth for your H2 Fuel Cell, and preserve catalysts and their performance!!! This Multifunctional Media even eliminates nitrous oxides (NOx) from air. Do not attempt to open the filter cartridge! If you do our return policy is null and void. The contents are VERY HIGHLY CONCENTRATED BLACK GRANULES that chemically trap the contaminants, and in theory can clean over 100,000 gallons of water. After extended use this will be saturated, but not toxic. You can safely dispose of the spent cartridge in the trash. The extra photos show the media inside a clear cartridge. PLEASE NOTE that this is the FIRST filter in my home and should be yours as well; it is placed before the particulate filter and the water softener. It works great to protect your health and plumbing, and will extend the life of the membrane in your RO unit as well if you use one! I've been using this filter for 18 months and enjoy great odor free water. Thank you very much!Jim