Killer Filter Replacement for FILTREC D721GW10A Killer Filter Products are manufactured with the highest quality materials and techniques on the market today. All filtration elements are guaranteed to meet or surpass all specifications of the original equipment manufacture. Killer Filter products undergo a stringent testing program and abide by multiple ISO standards for filtration. All items marked replacement or equivalent are not affiliated with the original manufacture. Part numbers are for reference to cross part only. All trademarks, registered or unregistered, are trademarks of their respective owners. Reference is made to these companies solely to identify the compatibility of Killer Filter, Inc. products with the OEM product; the OEM has not sponsored or endorsed our filters or products and Killer Filter, Inc. does not claim to make products for the OEM or supply original OEM products in most cases.