Ispring Fd15 Di Deionization Filter Ro/Aquarium 10" X 2.5", 1 Count (Pack, Clear Product Description Perfect for Reverse Osmosis DI Water System - Remove Hard Water material - To be replaced every 500-1000 gallons of water, produce 0ppm for your water - Fit 1/4" Fitting (not included) - Clear housing for easy view of media status - Refillable. From the Manufacturer Perfect for Reverse Osmosis DI Water System - Remove Hard Water material - To be replaced every 500-1000 gallons of water, produce 0ppm for your water - Fit 1/4" Fitting (not included) - Clear housing for easy view of media status - Refillable Product Features Re-fillable DI filter for RO DI system 2.5" x 10" inline filter Fits most RO DI systems, including those brand name models Refill 0 ppm Ion DI(De-Ionized), remove hard water material from the water and create 0-1ppm Great in reducing TDS level in your water Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!