Fittings for difficult tubes are available two dimensions and two varieties. Commonest sizes are 12mm and 16mm tubes. Tricky tube fittings characteristic just one quantity for labeling, and that is for the OD (Outer Diameter) on the tube it could accommodate. We say the „probable dilemma“ because expert and more http://valvesandfittings84803.amoblog.com/5-simple-statements-about-tubing-fitting-explained-15916530