The Aquacera Imperial OBE CeraMetix Filter for 10 inch Standard Housings The CeraMetix OBE filter cartridge combines our class-leading CeraSyl DE (diatomaceous earth) ceramic microporous outer shell with our AquaMetix core block technology. The ceramic shell and our AquaMetix block core combine mechanical filtration and physical absorption processes to reduce a wide variety of drinking water contaminants of both aesthetic and health concern. AquaMetix is made from the highest quality coconut shell based activated carbon and other superior adsorbent materials. Utilizing a unique compression molding manufacturing process, the base materials are melded into a solid block having a very uniform pore structure that ensures filtration consistency and high performance. The dense pore structure and vast surface area of the compressed carbon and specialty adsorbents are designed to improve taste and odor as well as to reduce chlorine, chloramine, volatile organic compounds, MTBE, lead, mercury, asbestos, arsenic, and fluoride. The cleanable ceramic shell is designed to remove suspended solids, pathogenic bacteria, and cysts. The CeraMetix elements have been tested in accordance with NSF protocols for cyst, turbidity, particulates, lead, chloramines, and chlorine reduction (Class 1).