In early December 2016 NB Key Diffusion performed a type approval of bundles of cylinders for carriage of compressed technical gases: UN1072; UN 1006; UN 1066; UN 1013; UN 1956 - Oxygen, Argon, Nitrogen, Carbon Dioxide, and their mixtures. The bundles of cylinders are manufactured by Remix-Bulgaria, Ltd. and are intended for sale to Messer Bulgaria, Ltd.