This is the replacement tubing for the DreamStaiton Go Travel CPAP Machine. It is designed to be very travel friendly with its 12mm diameter. The DreamStation Go Micro Tubing is 6 feet in length. It comes with a universal adapter that allows it to connect to any CPAP mask on the market. Making the DreamStation Go a great option for those in need of a travel CPAP Machine. The Tubing is Designed to be extremely flexible and very lightweight. Giving the CPAP user a travel friendly, but also user friendly experience.