Black Mountain Products Single Stackable Resistance Band Black Mountain Products Single Resistance Band Stackable Resistance Bands with Carabiner Clips (Handles not included) Yellow 2-4lbs, Blue 4-6lbs, Green 10-12lbs, Black 15-20lbs, Red 25-30lbs, Orange 30-35lbs, Purple 45-50lbs, Atomic 70-75lbs Great for gym, home, travel and office use Comes with manufacturer warranty