TheraBand FlexBar, Tennis Elbow Therapy Bar, Relieve Tendonitis Pain & Improve Grip Strength, Resistance Bar for Golfers Elbow & Tendinitis TheraBand FlexBar Red is ideal for those suffering from tennis elbow pain and looking to increase flexibility and range of motion Clinically researched and proven to reduce elbow pain by 81% and increase strength in the tendons by 72% in tennis elbow patients, Tyler Twist with FlexBar is simple and works Ridged design is easy to grip, twist and oscillate for elbow, wrist, forearm and hand rehabilitation and upper extremity strengthening, lateral epicondylitis therapy FlexBar is portable and convenient exercise, rehab, and injury prevention equipment, packaging includes detailed exercise instructions 12 long, 1 1/2 diameter, made from dry natural rubber, takes 10 pounds of force to bend to a U-shape