ProSource XTREME Premium Heavy Duty Double Dipped Latex Stackable Resistance Bands Set with Extra Large Handles, Door Anchor, Carrying Case, and Exercise Chart EXTRA HEAVY RESISTANCE  Set of 3 tube bands provides 3 resistance levels from 20 to 50 pounds for strong users who need more powerful resistance CUSTOMIZED WEIGHT  Fitness bands with durable carabineers and detachable handles can be combined for up to 9 levels of resistance OPTIMAL TRAINING  Bands challenge muscles in ways machines cant, requiring greater control and working through a full range of motion COMPLETE WORKOUT SET - 	Includes 2 extra-large foam handles, door anchor, exercise guide, and convenient carrying case for a full-body workout you can take anywhere DURABLE - Made out of double dipped, heavy duty latex to ensure high performance exercise bands that are resistant to breaking or snapping with normal use