Culligan D-20A Basic Drinking Water Filter Replacement Cartridge, 1 Count (Pack of 1), White Product Description Product Description The D-20A Basic drinking water cartridge provides 12 months/ 1,000 gallons of refreshing drinking water by reducing chlorine and bad taste. The D-20A is compatible with the following systems, US-550, RO-2127 and US-600A. From the Manufacturer Culligan D-20A Level 1 granular activated carbon drinking water filter cartridge reduces chlorine, bad taste and odor. It has a high surface area for maximum adsorption and has a filter life of up to 12 months or 1000 gallons. This filter cartridge fits model numbers US-550, US-600, US-560, US-560K, CTR-210, SY-5167, and RO-3167 Plumbed-In Reverse Osmosis System. The filter is NSF Certified and a 2 year warranty. It also includes a change reminder sticker and is recommended for city and well water supplies. From the Manufacturer Culligan D-20A Level 1 granular activated carbon drinking water filter cartridge reduces chlorine, bad taste and odor. It has a high surface area for maximum adsorption and has a filter life of up to 12 months or 1000 gallons. This filter cartridge fits model numbers US-550, US-600, US-560, US-560K, CTR-210, SY-5167, and RO-3167 Plumbed-In Reverse Osmosis System. The filter is NSF Certified and a 2 year warranty. It also includes a change reminder sticker and is recommended for city and well water supplies. Features Provide your family with visibly clean, great-tasting water for drinking, cooking and more FEATURES: Reduces chloride and removes bad taste and odor from water; Granular activated carbon; High surface area; 2-year warranty; includes change reminder sticker COMPATIBILITY: Replaces US-550, US-600, US-560, US-560K, CTR-210, SY-5167, and RO-3167 filters; Works with US-550, US-600A, and RO-2127 filtration systems FILTER LIFE: Up to 12 months or 1,000 gallons, depending on usage and filtration load CERTIFICATION: Tested and certified by IAPMO against NSF/ANSI Standard 42 for the reduction of aesthetic chlorine taste and odor USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.