ResMed AirSense 11 ClimateLineAir Heated CPAP Tubing Invacare Tracer IV Wheelchair Back Height 16" Carton Shipping Capacity 2L Back Height 16" Carton Shipping Weight 48 lbs 49 lbs 50 lbs Height 36" Length with Riggings 42" Product Weight with 16 Seat 40 lbs Product Weight with 20 Seat 42 lbs Product Weight with 18 Seat 41 lbs Seat Depth 16" Seat To Floor Height 17 The cover also has a non slip bottom for added user comfort and safety The ClimateLine Air heated tubing uses a built in mask temperature sensor to reach relative humidity at the mask Sensors inside and outside the CPAP machine closely monitor changes in humidity and prevents condensation from forming inside the tube