Check the listing for details. OUT Filter Mate Potassium Permanganate Iron Filter Regenerant 4.75 lb. Condition: New. Listed at 42.99 USD. Have closed our business and these are straight off the shelf. All items are sold as is. No Returns Shipping is flat rate for all continental US ( lower 48 states ) buyers. All others please inquire before purchase The OUT Filter Mate Potassium Permanganate Iron Filter Regenerant by Summit is a 4.75 lb unit designed to remove iron contaminants from water, making it suitable for both commercial and household use. This water filter regenerant is compatible with universal models and is effective in maintaining clean and safe water for various applications. With a focus on improving the quality of water, this product is a reliable solution for addressing water filtration needs in both residential and commercial settings.