The Edan 4000-7-25 is a single-use nasal gas sampling cannula manufactured by Salter Labs for sidestream capnography configurations. Engineered for adult patients breathing spontaneously without oxygen supplement lines, it pulls stable end-tidal CO2 data simultaneously from both nares. The attached 7-foot crush-resistant sample line concludes in a secure male Luer-Lok connector, linking straight into Edan G2-series internal sidestream analyzer sockets to prevent diagnostic waveform distortion.