Standard Universal Filter – Universal 10 inch Cartridge. Fits most standard under-sink 3 stage reverse osmosis water filter system, compatible with iSpring, Watts, APEC, Global Water, Watts, Premier, Flowmatic, PuROLine, Crystal Quest, Puromax etc. High Adsorption Capacity – Filtration rating of 5 micron, 3 Stage water filter replacement cartridges can effectively remove 99% of contaminants. Which provides safer, healthier water whether for drinking, cooking, showering, aquarium, garden, etc. Easy Installation – Individually wrapped and Drop-in cartridge design allows for quick and easy filter change. 100% Safe Filter – Our high capacity filter replacement cartridge with NSF42 Certified and ISO9001:2015 certificated ensure your drinking water safe. Food-grade materials give your more safe water. Package List:1X PP Sediment Filter 1X GAC Granular Activated Carbon Filter1X CTO Carbon Block Filter