You will receive 4 filters total as shown in the main photo. Each filter in new in its own packaging. Returns are accepted but the filters must be returned unopened.. The AO Smith Filter is a genuine 4.5″ universal sediment filter with a 25 micron rating, designed to effectively remove sediment contaminants from your water. This white filter is easy to install and provides clean, safe water for your household. With a pack containing 1 unit, this model (AO-WH-PREL_R) ensures a reliable filtration solution for your kitchen or dining area.