W.Sz.Z: Tz-280-104/25 (Pn) W.Sz. Z: Tz-280-104/25 Delivery Of Medical Oxygen In 2-Liter Cylinders With An Integrated Valve Along With The Lease Of A Cylinder, And A Mixture Of Medical Oxygen And Medical Nitrous Oxide In Cylinders Along With The Lease Of Cylinders, Stands And Exhaust Valves.