Supply oxygen for clinical patients by connect up anaesthetic aspiratory machine.Size (Fr/Ch)Inner Diameter(mm)Out Diameter(mm)Min Length of Tube(mm)Nasal or Oral/NasalOral82.03.0130110102.53.3140110123.04160120143.54.7180130164.05.3200140184.56.0220150205.06.7240160225.57.3270170246.08.0280190266.58.7290210287.09.3300230307.510310240328.010.7320250348.511.3320260369.012320270389.512.7320280401013.33202804210.514320280441114.7320280
