Carbon Block Filter: The 10” Hydronix carbon block filter has a particle retention size of 0.5 micron and is suitable for drinking water filtration applications. It has coconut shell activated carbon filter media to reduce unpleasant taste and odor from drinking water. This filter has a 2.5" outside diameter (OD) and an overall length of 9-7/8". It has an operating temperature range of 40 to 180 degrees F, and a maximum pressure rating of 250 pounds per square inch (psi). This carbon block filter is certified by the National Sanitation Foundation (NSF) Standard 42 for material requirements only, and is suitable for use in water dispensing applications where higher chlorine levels are present.