Waterdrop Replacement Filters for ACF Faucet Filtration System, Last Up to 18 Months (Pack of 3) ULTRA CLEAN WATER: The exclusive multi-stage filtration enables effective reduction of chlorine, sediment and other contaminants to deliver fresh and crisp water. HIGHLY ADSORPTIVE MATERIAL: Highly adsorptive Activated Carbon Fiber (ACF) for efficient contaminants reduction and fast adsorption speed. ULTRA-LONG 320-GALLON FILTER LIFE: Each filter delivers 6 months or 320 gallons of clean and fresh water, 3x longer than many other products, helping save your wallet. FAST & STABLE FLOW RATE: Our outstanding 0.5 GPM Hi-Flow rate allows an instant access to large amount of filtered water. 4 water bottles (16.9oz) can be filled within 1 minute. EASY & CONVENIENT: Simple design makes it easy and quick to change the cartridge. No pre-soaking is required. WASTE REDUCTION: 1 filter will replace up to 2,000 plastic water bottles (16.9 oz each) to save our environment. SATISFACTION GUARANTEE: Our 30-day money-back guarantee ensures your worry-free shopping. PROFESSIONAL Waterdrop: For years, Waterdrop is committed to elevating your daily life with cleaner and better-tasting water.