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2pcs of Melt-blown Polypropylene Sediment filters - 20" Big Blue Sediment filter is often the first filter installed in the Whole House Water Filter. Sediment filters are made of fine melted polypropylene, which is then blown and spun in a cylinder-like form. The main function of a sediment filter is to remove large and fine particles from a drinking water, such as sand, dirt, silt, and rust particles. Removal of such particles allows for a better performance of all the following filters, such as Carbon Block or GAC filters.

Aquaboon 2PP-20B 1 Micron Big Blue Whole House Water Filter Sediment 20-Inch 2-Pack - B00JV8Q9HA