R2 ESSENTIALS Replacement Filter by Instapure (Single), WQA Gold Seal Certified. Replacement for Models (R2, F2R-1ES, TAP-ESS-REPL-1) As low as $7.95 – Instapure
F2 ESSENTIALS System by Instapure. Chrome with Clear Cap, WQA Gold Seal Certified. As low as $20.95 Replaces Models (F2, F2C, F2BCT3P & TAP-ESS-SYS-CT-A1 ) – Instapure
Instapure F5 COMPLETE Tap Water Filtration System (Chrome with Chrome Cap) - Amazon.com