Amazon Premier Ro Pure Replacement Filter 5-pack Kit Content: 2 - 5 Micron Sediment Filter - reduces dirt, silt and rust which affect the taste and appearance of your water. 2 - 5 Micron Carbon pre-filter - made of high quality activated carbon. It reduces chlorine taste and odors, also conditions the water before it is treated by the reverse osmosis membrane. 1 - 5 Micron Carbon Block Final Filter - carbon filter is made of high quality activated carbon. It reduces chlorine taste and odors.