... fit for first-aid and healthcare of hypertension Gas cylinder/ Oxygen Cylinder:KBR SeriesThere are KBR-0.7L, KBR-1L, KBR- ... -7L, KBR-8L, KBR-10L, KBR-15L and KBR-40L oxygen cylinder for steel and aluminium material with bag or trolley ... ,healthcare and family use. In the meantime, all our KBR oxygen cylinders have been passed ISO13485.