Reverse Osmosis Parts 1 75GPD RO Membrane 1 Resident Reverse Osmosis Element Housing 3 14 QuickConnect Fittings1 Wrench 1 Raw material belt3 49ft ro tubing 14 Universal Size Fits most 4 and 5 6 and 7 stage residential RO filtration systems with flow restrictions rated at 75 gallons per day RO membrane size 1175 X 175 RO membrane housing size universal compatiable 25 inch OD fits 18122012 membranes 5075GPD Foodgrade FiltrationEffectively removes impurities down to 00001um Daily water purifying capacity reaches 75GPD at 975 rejection rate Durable ConstructionManufactured with FRPFiber Reinforced Polypropylene and ABS It is capable of resisting acids alcohol ammonia oils plating solutions and other corrosive chemicals Life Time 2436 months depend on your feed water quality For DIYThis kit does not include a flow restrictor In reverse osmosis membrane water purification systems flow restrictions are essential So for this kit of 75gpd we generally recommend that you purchase a 200CC flow restrictor and install it on the wastewater pipe