View basket “O2 O-RING suitable for DIN-477 couplings” has been added to your basket. O2 Union 4mm Y, one-touch€ 6,00 One-Touch (Push-to-Connect), 4mm, Y union. In stock (can be backordered) O2 Union 4mm Y, one-touch quantity Add to basket Categories: Adapters & parts, Oxygen Description Description O2 Union 4x4x4mm Y, one-touch. Related products Oxygen/Adapters & partsO2 Union 4mm I, one-touch € 6,00 Add to basket SaleOxygen/Mountain High EDSMH EDS O2D1 with Pressure Regulator (DIN-477) € 1.280,00 € 1.050,00 Add to basket Oxygen/Adapters & partsO2 Union 4mm T, one-touch € 6,00 Add to basket