... a grade LED Item No.:868N Product naem:Wrist ball with LED Description:Sheel material: A GRADE PCRoller material: ... tennis,squash,cricket,baseball,bowling,basket ball,motocross,mountain climbing.-Increase strength in fingers, wrists,hands,forearms,biceps, ... burn.-Do not use this product persons who with heart conditions of any description.-It is recommended ... from dust and damp 868N Wrist ball with LED