A double tube for oxyacetylene cutting welding is a union of two products (TO/TA) that allows two fuel gases to be supplied to a cutting nozzle, through two flexible tubes joined together. The double tube facilitates the handling and safety of the cutting operation, by preventing the gases from mixing before reaching the nozzle and complies with the ISO3821 standard . The material is available in internal diameters from 6 mm to 10 mm