The Gasco Calibration Gas - Air is a calibration gas cylinder containing 20.9% oxygen and 79.1% nitrogen. It is used for calibrating and checking gas detection and analysis equipment. This cylinder has a capacity of 103L and is filled to 1800 psi. It features a CGA-590 outlet connection and is constructed of aluminum. The cylinder should be stored and used in accordance with all applicable regulations. This calibration gas is suitable for various industrial, environmental, health and safety applications.