... move home and takes place, how to do? Dumbbell fitness now a lot of people choose, it is ... small and convenient, but traditional dumbbell is very heavy, and very dangerous, will accidentally ... yourself or others. How to do?Water-poured dumbbell has solved a series of problems, it is ... )To pour the water in the plastic dumbbell,then the magic dumbbell will become 5kg-10kg as you like. ...