LiquaGen Reverse Osmosis Filter Kit (4 Year Supply) for standard 10" RO Systems Set of 28 Reverse Osmosis Filter (8 Sediment,8 UDF Carbon, 8 Coconut Carbon,4 Inline Carbon) - 4 Year Supply Sediment, Carbon, UDF Carbon Size : 2.75 x 9.75 inches. Inline Carbon : 2 x 10 inches. Filters will fit any Residential Reverse Osmosis Unit that features standard 10 filter housing. Filters usually last for a year depending on the water quality, pressure, and outside air temperature. Brand: LiquaGen