The company is into manufacturing of Medical & Industrial Oxygen (O2)gas and Nitrogen (N) Gas. BOI, was established on 1994 at Sonapur, Sunsari. The medical O2 gas is 99.95% pure. It is supplied to various government hospitals, private hospitals and nursing homes. In addition, it also produces nitrogen gas, which is supplied to numerous packaging industries; they are used as food preservatives during packing, where packets are flushed with nitrogen gas that do not allow growth of micro-organisms in the packaged foods.