Rubberbanditz 12 inch Continuous Loop Powerlifting Band - 5-150 lbs Resistance Levels from 5-150 lbs (2-68 kg). Completely Customizable to Your Needs Offers an ascending resistance, increasing tension allowing you to capitalize on body's most powerful ranges of motion Substitute or Supplement Your Entire Gym Workout. Over 150 possible exercises explained in the included Rubberbanditz Resistance Training Workout DVD featuring Certified Personal Trainer Ari Zandman-Zeman 100% Satisfaction Guarantee With 60-Day Warranty Our power lifting bands are manufactured as a durable continuous 15-layer thick strip of rubber. Most durable band ever made