Quick Water Purifier Filter Closed Case 3-Piece Filter Set 12 Inch Quick Insert Sediment Filter Granular Active Carbon Active Carbon 6 Quick L Elbow 1. 5 Micron Sediment Filter (Inline Number 1) The 5 Micron filter cleans the coarse dirt (sand, mud, sediment, etc.) suspended in water down to 5 microns in size. 2. Granular Activated Carbon Filter (Inline Number 2) This filter helps to remove physical parameters such as color, taste and odor in water. 3. CTO Carbon Filter (Inline Number 3) Carbon filter uses nano technology to purify chlorine at a high rate and eliminate bad odor caused by chlorine. Thanks to its adsorption feature, it removes color, taste and chemical compounds.