PUR Compatible Refrigerator Water Filter Replacement Pure Source Ultra - 3 PackIts a perfect replacement for the original filter cartridge. Installing a refrigerator water filter could be done within a moment without any tools. At the same time, zero water leakage is ensured with your DIY installation. Save your costs on packaging. All costs are spent on the selected materials and product quality, offering you an excellent filtration experience. Superior Sri Lankan coconut activated carbon is adopted to improve the water taste.