Designed for DreamStation 2 Series CPAP Machines, this is the lightest and most flexible heated tubing ever created by Philips Respironics. With Micro-Flex Tubing, you can sleep in any position with no worries about mask drag or heavy tubing. The tube has a secure-click mechanism and PR12 Mask Adapter for compatibility with any manufacturer's standard CPAP mask. For Respironics’ modern masks like the DreamWear, remove the quick release connector and mask adapter from the tube for a seamless connection. Be sure to select the 12MM option when using Micro-Flex Tubing with DreamStation 2 or Go devices.