O2 Union 6 to 4 mm I, one-touch€ 7,00 One-Touch (Push-to-Connect), 4 x 6 mm, I union. In stock (can be backordered) O2 Union 6 to 4 mm I, one-touch quantity Add to basket Categories: Adapters & parts, Oxygen Description Description O2 Union 4 x 6 mm I, one-touch. To connect the smaller 4 mm air tube to the wider 6 mm tube. Related products Oxygen/Adapters & partsO2 Union 4mm Y, one-touch € 6,00 Add to basket Oxygen/Adapters & partsRegulator Fitting one touch 4mm – 90º € 15,00 Add to basket SaleOxygen/Mountain High EDSMH EDS O2D2 with Pressure Regulator (DIN-477) € 1.535,00 Original price was: € 1.535,00.€ 1.295,00Current price is: € 1.295,00. Add to basket