TheraBand Resistance Tubes with Padded Cuffs, 12" Long Professional Latex Elastic Tubing with Handles for Physical Therapy, Pilates, At-Home Workouts, Rehab, Blue, Extra Heavy, Intermediate Level 2 Attached no-slip cuffs for a ready-to-use clinical or home solution, great for resistive exercises Provides both positive and negative force on the muscles to improve strength, range of motion and cooperation of muscle groups Color-coded progressive resistance gives at-a-glance documentation of progress from one level to the next Rehabilitate muscles through simple yet effective workouts to increase strength & improve motion Extra Heavy Blue Tubes are the fifth of eight levels of resistance and great for rehabilitation and moderate to high resistance exercise, they offer 5.8 lbs. resistance and 25% increase from preceding color at 100% elongation and 8.6 lbs. at 200%