View basket “Transfill Adapter, CGA-540 to DIN-477 #9 (Euro)” has been added to your basket. O2 Union 6 to 4 mm I, one-touch€ 7,00 One-Touch (Push-to-Connect), 4 x 6 mm, I union. In stock (can be backordered) O2 Union 6 to 4 mm I, one-touch quantity Add to basket Categories: Adapters & parts, Oxygen Description Description O2 Union 4 x 6 mm I, one-touch. To connect the smaller 4 mm air tube to the wider 6 mm tube. Related products Oxygen/Oxygen cylindersAluminium cylinder – 2 liter € 159,00 – € 185,00 Select options Oxygen/Adapters & partsO2 O-RING suitable for DIN-477 #9 couplings € 1,50 Add to basket Oxygen/Adapters & partsOxygen Cylinder Transfiller System € 239,00 Select options