WaterSentinel WSG-4 Made in USA Refrigerator Replacement Filter: Fits GE RPWF Comparable to the GE RWPF Features an Activated Carbon Block filtration media to reduce Chlorine Taste and Odor Reduces Sediment, dirt, sand, and other free floating impurities that may be in your water Nominal 0.5 micron filtration rating Filter Lasts for up to 3 months depending on water usage