O2 Union 6mm Y, one-touch€ 6,50 One-Touch (Push-to-Connect), 6mm, Y union. In stock (can be backordered) O2 Union 6mm Y, one-touch quantity Add to basket Categories: Adapters & parts, Oxygen Description Description O2 Union 6x6x6mm Y, one-touch. For use with wider 6mm O2 air tube. Related products Oxygen/Oxygen cylindersLight steel cylinder – 1, 2 or 3 liter € 145,00 – € 209,00 Select options Oxygen/Adapters & partsMH-400 High Pressure Gauge € 29,00 Add to basket Oxygen/Oxygen cylindersAluminium cylinder – 2 liter € 159,00 – € 179,00 Select options