Shivsu canadian clear water technologies [p] ltd has a state of art cross - link polyimide composite reverse osmosis membrane element manufactured specially by us. We have extensive experience accumulated over the years and wide range of reliable technology. Shivsu canadian clear water technologies [p] ltd reverse osmosis membrane meets the diverse needs of the water treatment and wastewater treatment industry. Shivsu canadian clear water technologies [p] ltd is one of the largest suppliers of reverse osmosis membrane all over the world. Sizes : membranes are available in all international standard sizes namely 2 ½ " x 40", 4" x 40" and 8" x 40" available for tap water, brackish water and sea water.