With this set the user can configure and maintain the system for many years easily and economically. The Set includes: 1. High quality solid particle filter 10″ made of polypropylene by Aqua Filter (USA). Removes soil, rust, sediments, microparticles, etc. up to 5 microns. Ideal solids filter for all filtration systems and reverse osmosis units. Its shelf life ranges from 6 to 12 months. 2. GAC + KDF (N.SF) Activated Carbon filter from Aqua Filter (USA), Removes the largest percentage of chlorine, chemical elements, pesticides and unpleasant odor and taste while the KDF material drastically reduces the percentage of a series of heavy metals while being bacteriostatic properties. Its shelf life ranges from 6 to 12 months. 3. Aqua Filter (USA) softening and iron removal filter, Used for effective and economical hardness reduction and iron removal in any point of water consumption application. The filter contains a special blend of softening and de-ironing resins, suitable for potable applications (food grade), while it can also be used as a pre-filter in reverse osmosis systems to provide protection against excessive hardness in the reverse osmosis membrane, thus extending the service life her. The life of the filter varies from 6 to 12 months 4. Aqua Filter in-line Aifir 200 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, helps to minimize the fluctuation of human body ph. 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. The lifetime of the filter is 12 months.