RO (Reverse Osmosis) membrane is a key component in a reverse osmosis system, which is used for water purification. It's a semi-permeable membrane that allows water molecules to pass through while blocking the majority of contaminants, such as dissolved salts, minerals, particles, and bacteria. RO membranes typically consist of thin film composite (TFC) materials that are highly efficient in removing impurities from water, making it suitable for various applications including drinking water purification, desalination, and industrial processes. Regular maintenance and replacement of RO membranes are essential for ensuring continued water purification efficiency and quality.