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