The Boxing Mad Adult Free Standing Adjustable Speed Ball is perfect for improving hand-eye co-ordination, whilst working off your aggression and getting a great workout in the comfort of your own home. The rotating PU speed ball is durable and is positioned on a spring, height adjustable chrome bar. The tough base can be filled with either water or sand for great stability. The height of the speed ball can easily be adjusted from 130-156cm to suit the height of the user. This item comes with all tools required for limited assembly.