The 18" Sparkling Clear Sand Filter is manufactured with high grade fiberglass and resins for durability, this filter will give you years of clean pool water. It filters out everything larger than 3 - 40 microns. Sand/media still remains the most popular choice on the market for their durability and simplicity in maintenance. Pool water free from debris and other contaminants is important for maintaining swimmers’ health and safety. Choose a sand filter today.