AirSense/AirCurve 11 Tubing Humidifier Chamber – 340ml TubInnovative DesignRespure designed tubing adapter water chamber two in one, removing the original hinged clamshell connection structure to prevent hands from being pinched, more convenient to assemble and clean inside. Supper DurableOur water chamber base is made of 316 stainless steel and better plastic. There is no need to worry about the plastic cracking and separating, and the longevity is longer than the original brand. Easy to Install Water