Help you to burn calories and become taller in a healthy way. An ideal equipment: kids can have healthy body and nimble thinking when they are in the necessary growth stage; adult can restart feeling his good childhood and taste the most exciting experience. A healthy vehicle: you can escape from the smell of gasoline. A distinctive performance equipment: let yourself, family, team, club, acrobatic troupe and amusement park attract more and more admiring eyes. To make you become a master-hand of basketball soon. A good training tool: for army, sportsman and school, As a new invention, it can be used as a training tool to make people's bones and skeleton stretched enough, to make their muscle stronger, to make them create better achievement and more miracles. Outer packing size: 87x21x39cm Product size: 340x185x890 mm Net weight: 7.0kg Gross weight: 8.5 kg Color: silver Packing: one pair/carton Models available:(according to your weight) Cz60-for user who weighs (60-70kg, 131~152lbs) Cz70-for user who weighs (70-79kg, 153-174lbs) Cz80-for user who weighs (80-89kg, 175~196lbs) Cz90-for user who weighs (90-99kg, 197~218lbs) Cz100-for user who weighs (100-109kg, 219~242lbs) Cz110-for user who weighs (110-120kg, 243~265lbs)