This commercial reverse osmosis membrane is rated at 2200 gallons per day. The spiral wound configuration polyamide material makes this thin film composite membrane 99 1/2 percent efficient in salt rejection. The Temperature rate should not exceed 113 F/45 C and the working water pressure should not be greater than 400 psi. The pH cleansing range is between 2 and 11. This membrane measures 4 x 40 inches.