O2 Union 4mm I, one-touch€ 6,00 One-Touch (Push-to-Connect), 4mm, I union. Only 2 left in stock (can be backordered) O2 Union 4mm I, one-touch quantity Add to basket Categories: Adapters & parts, Oxygen Description Description O2 Union 4x4mm I, one-touch MH p/n: 19056-0400-00 Related products Oxygen/Adapters & partsO2 universal mounting kit from Mountain High € 159,00 Add to basket Oxygen/Cannulas & masksEDS Cannulas for EDS pulse demand systems € 11,50 Select options Oxygen/Cannulas & masksEDS Face Mask € 13,50 Add to basket