https://www.capno-med.com/products/disposable-etco2-airway-adapter/ Disposable Et CO2 Airway Adapter Exquisite design, small dead space; Precise size, tight connection; Made of medical grade material, safe and reliable; Strong compatibility; Specification of Disposable Airway Adapter Project Specifications Principle of Operation Connected to the gas path, make the EtCO2 Sensor to measure the gas passing through it.All Rights Reserved