ThermoActive Knee Support Balance Disks Exercisers 5 inches * Height from Instrument and Solution Stands 5 inches * Height from floor to top of back: 53 inches * Height from floor to top of seat: 22 * These colorful inflatable molded heavy duty rolls can support up to 300 pounds and a unique hand held pump that adjusts the level of compression * Fits circumference up to 20 below the knee as is or up to 30 with extender straps that are included * Fits circumference up to 21 above the knee as is or up to 31 with extender straps that are included * Indications: Ligament injuries and strains (ACL PCL MCL) meniscus strain or injury patella tendonitis chondromalacia bursitis arthritis Post Surgery Treatment a patented removable gel pack that can either be frozen or heated depending on the use