USA | Battery Systems, Supercapacitors & Solar | Product | Exhibitions & Conferences Luxfer introduces Type 4 hydrogen tank at ACT Expo By Bradley Osborne – 29th May 2023 Storing hydrogen at 350 bar pressure, the ‘G-Stor Go H2 Hydrogen Cylinder’ is made from lightweight composite materials with a polymer liner (i.e., “Type 4” cylinder technology).