Oxygen 2.5 Chemical formula: O2 Valve fitting according DIN 477: Nr. 9 Gas cylinder size: 10,0 Ltr., 20,0 Ltr., 50,0 Ltr. Downloads Material safety data sheets Sicherheitsdatenblatt (PDF, 162 KB)material safety data sheet (PDF, 156 KB) Standard specifications Spezifikation (PDF, 134 KB)standard specification (PDF, 135 KB)