The Protec Demineralization Cartridge DC-51 is a new product designed for use in heating, cooling, and air systems. Made by the brand Pro-Tec, this white and blue cartridge is model PDC51V1 and was manufactured in 2016 in China. It is specifically designed to remove minerals and impurities from the air, ensuring cleaner and healthier air circulation in your home or business. The Protec Demineralization Cartridge DC-51 is a reliable and efficient solution for maintaining the quality of the air in your living or working environment.