Additional Details ------------------------------ Product description: The 3M Aqua-Pure Under Sink Full Flow Replacement Water Filter Cartridge AP217 is the good choice in water filtration delivering cleaner, clearer drinking water. This under sink replacement water filter cartridge is NSF listed to reduce chlorine taste and odor. The AP217 replacement cartridge is for use with the space saving, compact design AP200 water filter system and also reduces sediment.