, supply of medical gases , medical oxygen aa- typecyl ( cap-0.34 m3 ) , medical oxygen a- typecyl ( cap-0.623m3 ) , medical oxygen b- type cyl ( cap-1.5 m3 ) , medical oxygen d- type ( bulk ) 7 meter cube ( m3 ) , nitrous oxidea- type cylinder kg , nitrous oxideb- type cylinderkg , nitrous oxided- type ( bulk ) kg , nitrogen gas d-type ( bulk ) ( 99% pure culture grade nitrogen gas ) meter cube , carbon dioxide a-typekg , carbon dioxide d-type ( bulk ) kg , medical aird-type ( bulk ) meter cube , liquid nitrogenkg , calibration gases conc;oxygen-15.8% carbon dioxide - 4.6%nitrogen - balance cyl ( cap- 1.3m³ ) , diffusion gases carbon monoxide: 0.275%helium: 17.71%balance: med grade air.cyl ( cap- 1.3m³ ) , argon gas meter cube , hydrogenmeter cube