CSM's energy-efficient, reverse osmosis (RO) membrane elements, manufactured by Toray, are available as BLN (150 psi) or BLF (100 psi) series. Ideal for various applications requiring clean water for potable or various commercial uses. Nanofiltration (NF) membrane elements are available in three different specifications based on different monovalent ion rejection for selective ion removal. Available in multiple sizes (diameter and lengths) to meet production needs and ships from San Diego, Calif. Tested and certified under NSF/ANSI 61 for drinking water system components.