iSpring # F5-75 Reverse Osmosis Replacement Set of 5 Filters with 75GPD RO Membrane Premium Set of 5 pieces Replacement Filters for 5-Stage RO systems Fits most standard 10"-housing reverse osmosis water filter systems 75GPD TFC membrane included Compatible to brand name RO systems like GE, Watts Premier, Apec, Purepro and etc.