This commercial reverse osmosis membrane is rated at 150 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 113F /45C and the working water pressure should not be greater than 400 psi. The pH cleansing range is between 2 and 11. This membrane measures 2 1/2 x 14 inches.