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 mounting bracket for MH AL-248/415/682 cylinders € 59,50 Add to basket Oxygen/Adapters & partsRegulator Fitting one touch 4mm – 90º € 15,00 Add to basket Oxygen/Oxygen bagsO2 cylinder bag – black € 69,00 Add to basket