This refrigerator water filter is supplied by Samsung to ensure it is an accurate fit for your fridge. It has a capacity of 300 gallons. The water filter helps to reduce water contamination by removing unwanted substances like chemicals and heavy metals which can make their way into your water supply. Each filter is tested and certified by NSF international as a guarantee of safety. If the filter light indicator on your fridge is red, this indicates that it is time to change your filter. Each filter also comes with a monthly reminder sticker inside the packaging to help you remember to change your filter.