InstaPure F2R-4ES Replacement Filter, 4 pack Replacement filter for the F-2C or F-2 Includes four filters The R2c filters are a cost effective method to produce clean and better tasting water ANSI/NSF Certified for the reduction of Chlorine (Class II) taste and odor Save Space and filter up to 5X more water than typical Pitcher Filter. Save Money and the Environment vs. Bottled water! Compatible with all ESSENTIALS (F2) &amp; (F5) Faucet (Tap) Filter Systems Black Filter Housing with Clear Cap to monitor filter life Interchangeable with Instapure Complete (F5) Complete Plus (F7) Systems No tools required for assembly Operating pressure: 20-100 psi Operating temperature: 40-100F 99%of Lead 99%of Microbial Cysts 99%VOC&#039;s 97%of Chlorine Taste &amp; Odor