These black colored 500 Litre Water Tanks are ISI certified tanks designed to keep the water safe with their triple layer body. They come in strong and virgin plastic to maintain the temperature of water. Their black layer protect water from UV radiation. In addition to this, they also protect water from algae formation with their bacteria-free and aesthetic design. With rugged structure and sturdy design, they also ensure to stay safe for a long time even during rain, heavy-winds, etc.