The LiquaGen RO Membrane Filter provides you with a precise and advanced membrane element that not only delivers an attractive cost to benefit ratio, but also gives you a membrane that is consistently high quality and high octane performance for your Water Purifier! TOP OF THE LINE: This membrane is top-quality, and equals or surpasses all of the performance specifications of other membranes of the same 100 GPD capacity. This membrane is tested ANSI Standard 58 for material requirement. LiquaGen Reverse Osmosis Membranes are made of the highest quality spiral-wound Polyamide and offer outstanding contaminant rejection at water pressures up to 125 psi. INNOVATION IN DESIGN: This deliberate matching of design increases the efficiency and effectiveness of the contaminant rejection of the membrane along with optimizing the amount of reject water necessary to clean the membrane during normal everyday use. SPECIFICATIONS: This membrane fits most 4 ,5, 6 and 7 stage residential RODI or Reverse Osmosis System's with flow restrictions rated at 100 gallon's per day. Length: 11.75" Outside Diameter: 1.8". Fits all standard 2" x 12" RO membrane housings. Replace at 3-year intervals or sooner if TDS levels increase beyond normal levels APPLICATIONS: This water filter can be used in a variety of water filtration system applications, such as household water purification, laboratory, hydroponics, hospital, and many other applications where a reliable, performance membrane is needed.