Thera-Band® FlexBar® is a flexible, durable resistance device with a ridged surface for enhanced grip during use. It is used to improve grip strength and upper extremity stabilization by bending, twisting, or oscillation movement. It has been research-proven effective for Tennis Elbow, offering a cost-effective treatment that requires no injection or expensive equipment.
Thera-Band FlexBar is 12" long and is made from dry natural rubber in 4 progressive resistance levels to match user capability.
The Yellow Thera-Band FlexBar takes 6 lb. of force to bend to a u-shape, Red 10 lb., Green 15 lb., and Blue 25 lb. http://thera-band.com