O2 Union 4mm T, one-touch€ 6,00 One-Touch (Push-to-Connect), 4mm, T union. Only 3 left in stock O2 Union 4mm T, one-touch quantity Add to basket Categories: Adapters & parts, Oxygen Description Description O2 Union 4x4x4mm T, one-touch Related products Oxygen/Adapters & partsO2 Union 4mm I, one-touch € 6,00 Add to basket Oxygen/Adapters & partsO2 mounting bracket for 10 cm (EU) cylinders € 39,50 Add to basket Oxygen/Adapters & partsMH-400 High Pressure Gauge € 29,00 Add to basket