Oxygen Industrial grade 2.5 (99.5%) has a high oxidation potential which makes it ideal for combustion. It is typically used with a fuel gas for cutting, welding and other combustion applications. Supplied in a 30 litre Integra® cylinder at 300 bar. Integra® cylinders are safer, smaller and lighter. The Integra® cylinder is designed to be used with a choice of Integra® flash back arrestors (available separately).