... joint the pipe adapter with air tube,should cut the end face of air tube by sharp knife or air- ... -angle surfce first,then proceed the connection of air tube.Part 2. The external diameter of air pipe connecting ... is nominal diameter 0.1mm,If use the air tube with oval section,then suggested use the air pipe ... no longer than 0.2mm.tube size: 04,06,08,10,12.. Y type three way push in tube fittings (stock)