The Everpure EV961821 7Cb5-S Cartridge is a genuine OEM product designed for commercial water filtration systems. This cartridge is specifically designed to provide high-quality filtration for both residential and commercial use. The product is manufactured by Everpure, a trusted brand known for producing reliable water filtration solutions. It is important to note that this product contains a California Prop 65 Warning due to potential cancer and reproductive harm associated with its use.