Shake dumbbell simply use,you can shake it anytime,anywhere, Shake weight vibration dumbbell Material:ABSSize:1300*82*82mmFitness for male and female1.You will feel it very easy ,and comfortalbe2.excise your arms and muscle Of course,we also accept customlizedWe are professional fitness equipment manufacturer,with complete process line,and also service for TECHNOGYM,ICON,KAWMAY,NATONAL GYM and so ...