it is portable with good quality and beautiful design oxygen volume: 280 working pressure:15Mpa ... wrench humidification cup4L-16.5140*4807ALUMINUMAlumel cabinet, oxygen bridge, oxygen tube, adjustable watch, humidification cup, wrench7L12150*610437MnPush ... Back, adjustable watch, wrench, oxygen tube, tools bag,humidification cup, trolley10L20150*800437Mn10L-111155 ...