Culligan 2-Stage Under-Sink Drinking Water System Replacement Cartridge. This cartridge offers a flow rate of 0.5 GPM and effectively reduces taste, odor, chlorine, particulate class 1, cysts, lead, lindane, and atrazine. Certified to NSF 42/53 standards, it ensures clean and safe drinking water. Compatible with Culligan Under-Sink drinking water system TV# 216904. Comes boxed.