Rev up your workout routine with the Natural Fitness Adjustable Resistance Tube. This simple piece of exercise equipment helps you meet your fitness goals. It gives you a full body workout and concentrates on cardiovascular fitness, toning and strength training. Adjusts easily so you can tailor it to your needs. Measuring in at a petite 4.8"L x 0.5" W x 0.5" H, you can stash this fitness tool anywhere. Includes guidebook that gives you suggestions and instructions for a full body workout.