If you are looking for an amazing challenge with your resistance tube training, this is the product for you. Developed and designed with the max-trainer in mind, the ProGym Extreme comes with 4 resistance tubes that allow 12 weight combinations up to 140lbs of resistance. Used together or individually, these extreme tubes will help your muscles learn and burn. Heavy carabineers, premium rubber tubing, heavy duty metal connection rings, reinforced door anchors, padded ankle straps and professional grade handles, keep you geared up strong and comfortable in that stretch. Our professionally developed exercise manual will lead you through a complete body workout for your train anywhere, anytime regimen. Start your Extreme body today.Includes: ? 4 Premium Rubber Resistance Tubes: 20 LB(Green), 30 LB (Red), 40 LB (Blue), 50 LB (Orange) Resistance Tubes have extra thick nylon webbing, reinforced stitching and heavy duty metal connecting rings. ? 2 professional grade handles with easy grip rubber. ? 2 door anchors with thick nylon webbing. ? 2 reinforced and padded ankle straps. ? 1 professionally developed laminated exercise manual. ? 1 carry bag.