This Coconut Carbon Sediment Filter fits all Culligan Aqua Cleer (AC) and H Series reverse osmosis systems, such as the H-5, H-8, H-82, H-83, AC-15, AC-30 and AC-50. It is a precarbon, coconut carbon block filter with a 10 micron rating that will remove sand, silt, dirt and rust from your water. Culligan Compatible SC1216110