EXCITO-ST-CW Annual Replacement Filter Set, Especially for Aqua Filter's Excito System. The SET12ST-CW Set Includes Two Packs of EXCITO-HF-CRT Spare Parts and One AIFIR 200 Filter, AICRO-AB, Specifically: 1. Two (2) Polypropylene In Line Filter AIPRO-20M-AQ 2.5" x 12 ". The AIPRO-20M-AQ In-line sediment filter cartridge removes sediment, such as sand, mud, rust and suspended solids. 2, Two (2) Piece In Line Softening Filter 2.5"X12" The AIPRO-3-L-AQ Softening Filter is used to effectively and economically reduce hardness and iron removal in any point of water application. 3. Two (2) 2.5"x12" In Line Solid Activated Carbon Filter AICRO-L4-AQ Series. Solid activated carbon made from high quality raw materials. In order to improve the water purification process, this filter uses coconut shell carbon that meets strict NSF standards. With the unique formula developed, the Silver series filters achieve "softening" of the water, removal of heavy metals from the water, lead, copper, mercury and the removal of radioactive particles strontium and cesium. 4. One (1) piece AICRO-AB Coconut Granulated Activated Carbon Filter Removes chlorine, organic matter, certain pesticides and improves water odor and taste. The nanosilver BACinix™ technology protects the filter from microbiological growth, increasing its longevity and has a full bacteriostatic effect. 5. One (1) piece of Alkaline Ion Filter In-Line Alkaline AIFIR 200. It enriches the water with a large amount of calcium, magnesium, sodium, potassium, selenium and other trace elements necessary for the proper functioning of the body. Produces alkaline water with full ph balance. Converts acidic water into alkaline calcium ion water. Easily absorbed by the human body because it has small structured molecules that help the human body to take in more water and quickly replenish lost water.