SHARKK Resistance Band Set For Workouts And Exercise with Door Anchor, Ankle Strap, and Resistance Band Carrying Case, For Use At Home or Gym Featuring detachable grips and straps that allow for seamless band-interchangeability. Bands can be combined to produce multiple levels of resistance (4lbs-75lbs). Includes a door anchor, soft-grip handles and adjustable ankle straps for maximum utility. Bands contain Latex. 1 year warranty and satisfaction guarantee! Multi-level Bands: Yellow (2-4 lbs.), Blue (4-6 lbs.), Green (10-12 lbs.), Black (15-20 lbs.), Red (25-30 lbs.).