The iSpring F3WGB31BKDS Ultimate Filter Pack is a 3-stage water filter designed for household use. It is specifically designed to remove lead, scale, and hydrogen sulfide contaminants from the water. The filter pack includes 3 filters and is compatible with the F3WGB31BKDS model. Made by iSpring, a trusted brand in water filtration, this white filter is easy to install and provides clean, safe water for your household. With its compact dimensions of 4.5″ depth, 10″ height, and 4.5″ width, this filter pack is a practical and efficient solution for your water purification needs. BRAND NEW UNUSED STILL SEALED