Jorestech Impulse Bag Sealer + Kit Manual Heat Seal Hand Held Closer 16 Inch (5mm) Retains the beneficial minerals in water for better health Great value for money with the superior quality Features the same great quality as original filter at a fraction of the price It is recommended to replace the filter every 6 months or 300 gallons, whichever comes first. We are sure you will enjoy the benefits of our product, for concerns, you can contact us and ask refund.