The Replacement ComfortLine Heated Tubing is the replacement tube for use with the ComfortLine Heated Tubing Kit. This is the tubing only. It does NOT include the power supply and cords which are required to heat the tube. Tubing is 6 ft long and 19mm in diameter. The cuffs of the tube are rigid to support the heated tube. Not compatible with PR System One devices with software Versions EARLIER than 1.24.