The Reverse Osmosis water filtration technology Membrane by Hydranautics (Nitto) is designed for Brackish Water applications that require a psi of 150. This Membrane uses Reverse Osmosis water filtration technology to take out 99.60% of contaminants found in the feedwater, which makes it best suited for treatment of drinking water, industrial process waters, and municipal and industrial waste water recovery and reuse. Made in China, the Reverse Osmosis water filtration technology Membrane ESPA2-LD-4040 is Low Fouling Spiral Wound Composite Polyamide. The advantages in using the Hydranautics (Nitto) ESPA2-LD-4040 Membrane are operating at significantly lower pressures, ESPA elements produce high quality water in a range of water treatment applications, ensuring energy cost savings, exceptional performance capability, these membranes serve as part of polishing units in seawater desalination plants when boron rejection is critical, low pressure brackish water membranes, and use patented Low Differential LDTM technology designed to minimize colloidal fouling. Hydranautics (Nitto) is a United States company well known for high-quality Membrane manufacturing for effective Reverse Osmosis water filtration technology. Product Specs Flow: 2000 Nominal Salt Rejection: 99.60% Psi: 150 Size: 4 x 40 Type Of Filtration: Reverse Osmosis Water Type: Brackish Water Weight: 8.5