This omnipure water filter cartridge is a standard size 10″ x 2.5″ 100% coconut carbon (not a coconut/coal blend) for sweeter tasting water. Removes chlorine, bad taste and odours, bacteria, colour, cysts, heavy metals. In order to remove cryptosporidium and giardia a water filter cartridge must be absolute 1 micron, this cartridge is NSF approved and will remove >99.99% of cysts from the water. Suitable for countertop water filters and under sink water filter systems. USA made.