HDX HDX2SF4 String Wound Whole House Water Filter (2 pack): Reduces Sediment - 10 Micron Water Filter Universal Fit - Fits Glacier Bay advanced and basic filtration systems HDG2VS4 & HDG2BS4 and all major brands of standard capacity household systems Reduces sediment, NSF certified 10 micron filter Replace this filter every 3 months Questions? Contact our customer support center at 1-800-247-1087