Avanti Membrane Technology Stage 5 Inline Carbon Filter for under-sink RO filtraiton drinking water system, 1/4" Quick Connect, 2" OD X 10" L (ICF-1020Q) * 5th stage premium inline carbon filter polishes and crispens up the taste of water after RO membrane 1/4" Quick Connect fittings for easy and toolless installation 10-inch industrial standard size; compatible with other similar filtration systems; can be used as an inline filter for refrigerator