O2 Union 6 to 4 mm I, one-touch€ 7,00 One-Touch (Push-to-Connect), 4 x 6 mm, I union. Only 3 left 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 € 145,00 – € 175,00 Select options Oxygen/Cannulas & masksEDS Face Mask € 12,50 Add to basket Out of stockOxygen/Adapters & partsTransfill Adapter, CGA-540 to DIN 477-9 (Euro) € 99,00 € 79,00 Read more