The Respironics heated tubing is a heated, white CPAP tubing. It spans 6 feet in length, with an inner hose diameter of 15mm. While its primary design is for use with your sleep therapy device’s heated humidifier, you also have the option to connect it directly to your machine without a heated humidifier if that’s your preference. This CPAP tubing is intentionally designed for compatibility with the DreamStation Auto, DreamStation BiPAP, DreamStation 2 and SystemOne 60 Series CPAP machines. Pay by insurance? Please call (877) 799-0202.