Granulated Activated Carbon Filter – 5 Micron Size: 20″ x 4.5″ Media: 100% PURE coconut carbon. A high quality filter with GAC sourced directly from Haycarb Holdings. They offer carbon of the highest grade-the supplier to globally renowned companies such as Coca-Cola. We do not use nor offer cheap carbons, so we may not offer the same price as our competitors, however, you can be assured that the carbon we sell is 100% PURE coconut carbon, not a coconut/coal blend as sold by less reputable resellers. Coal/Coconut Carbon should not be used in drinking water.