【ADJUSTABLE PORTABLE TRAINING WEIGHT】Compare with the Traditional iron dumbbell, these travel dumbbells are foldable. They are easy to carry and better manage your physical condition at all times. You can Exercise your biceps, triceps, arms and convert fat into muscle, Keep your upper body healthy. 【CONTENTS OF THE SET】This travel dumbbells package is including 4 dumbbells balls, 8 screws and 2 extension rods. Pour water into the ball bag and adjust to the appropriate weight as needed. (8-10 kg) 【SAFE & SECURE】We have absolute confidence in quality. weights dumbbells not only can quickly exercise the upper body strength, it is a water filling device, adjustable dumbbells are safer than solid iron and will not hurt the floor and you family. 【HIGH QUALITY & DURABLE】Made of high quality PVC material, no odor, soft & durable. Our water weights dumbbells can be used for long periods of time, no matter how they roll without deforming or breaking. 【MONEY BACK GUARANTEE】We are so confident you will love our adjustable dumbbells that we will give you a no fuss money back guarantee if you are not satisfied with our dumbbell water bottle.