TheraBandTM FlexBarreg; 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. Available in four color-coded levels of resistance, based on the amount of force needed to bend the FlexBarTM into a U-shape. The Yellow FlexbarTM requires 6 lbs. (2.7kg) of force. The Red FlexBarTM requires 10 lbs. (4.5kg) of force, Green requires 15 lbs. (6.8kg), and Blue requires 25 lbs. (11kg).