GAC UDF Coconut shell Carbon Filter Fits most standard size housings and most reverse osmosis systems. Removes Chlorine, Turbidity, Bad Taste & Odor, Sediment, Dirt, and THMS from water. Thick Wall Coconut Base Carbon Filter Media - 100% coconut shell carbon Designed For maximum contact between the water and carbon. Nominal filter membrane included to prevent carbon fines to pass from the filter to your drinking water. Operation Temperature: 40°F to 125°F Low pressure drop through filter. All filters are individually wrapped.