Pentek CBC-10

http://www.waterfilters.net/Pentek-CBC-10-Cyst-Reduction-Water-Filter.html
The Pentek CBC-10 ia a nominal 0.5 micron Pentek CBC-10 Carbon Block Water Filter Cartridge designed to produce healthier, better-tasting drinking water by reducing 99.5% of Cryptosporidium, Giardia, Entamoeba,and Toxoplasmacysts (based on manufacturer's internal testing) and chlorine taste & odor. Pentek CBC-10 water filters have enhanced dirt holding capacity and the unique structure of the carbon block enables it to reduce Giardia, Cryptosporidium, Entamoeba, and Toxoplasma cysts and fine sediment particles down to 0.5 microns. Also known as the Ametek CBC-10 water filter, these cartridges are an ideal choice for a wide range of residential, food service, commercial and industrial applications. They also make excellent polishing filters or pre-filters in applications requiring fine filtration and high capacity.