Products Details Products List Our high pressure cylinders would be used for different industries. Firefighting cylinders: ISO9809-1 and GB/T 5099.1 for steel cylinder;BS5045-8 and DOT-3AL for aluminum cylinder;ISO9809-3 for cartridge cylinder. Medical and industrial gas cylinders: ISO9809-1 for steel cylinder;ISO7866 and DOT-3AL for aluminum cylinder. Get In Touch With Us For more information, please fill in the form below to contact us.