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 SaleOxygen/Mountain High EDSMH EDS O2D2 with Pressure Regulator (DIN-477) € 1.490,00 € 1.250,00 Add to basket Oxygen/Adapters & partsO2 mounting bracket for MH AL-248/415/682 cylinders € 59,50 Add to basket Oxygen/Adapters & partsOxygen Cylinder Transfiller System € 239,00 Add to basket