One filter for each pool central element of the filtering system, the filter contains a filter medium (which can be sand, glass, cartridge, or other material as a function of the filter type). Waste and impurities are retained in the body of the filter.The performance of the filtering system is indispensable for the effectiveness of water treatment. The filter performs a crucial function for maintaining a crystal clear water fit for bath.MS sand filtersLaminated filters of efficient and lasting fiberglass reinforced polyesterCompatible with the sand filter and crystal (Crystal Clear)Easy maintenanceEasy to installEfficient filtrationFiberglass reinforced polyester filter with 6 -way side valve, transparent lid, gauge and purge. Includes a filter drainage system.