Nitin Cylinders Ltd. Manufactures Oxygen/ Nitrous Oxide Cylinders for Medical Purposes. Nitin Cylinders Ltd. Is an ISO 9001: 2000 certified company. The Oxygen/ Nitrous Oxide Cylinders for Medical Purposes are used for respiratory treatment for the revival and restoration of human life and also during medical operations for the use of anaesthesia. The medical gas cylinders are designed to comply with the stringent national and international standards. Special care is taken to maintain a smooth clean internal surface to avoid trapping of contaminants. These cylinders can be supplied with Bullnose or Pin Index type valves. The external surface of these cylinders is treated with good quality enamel/epoxy paint.