Medical and surgical equipment for the purpose of delivering humidification and/or oxygen therapy; anaesthesia respiratory apparatus; capnography apparatus; humidification apparatus for respiratory therapy; anaesthetic and respiratory apparatus and instruments including respiratory gas mixing apparatus for medical use; invasive and non-invasive ventilation apparatus and instruments; breathing tubes used in the delivery of air and gases to and away from patients; cannulae; nasal cannulae; cannula for respiratory purposes; collapsible cannula for respiratory purposes; tubes for medical or surgical use; facial masks, oral masks, nasal masks, nasal interfaces, mouthpieces, all being for medical and surgical purposes