The DKN studio aerobic step comes with 4 risers, a big, strong and durable platform made from reinforced plastic, and has a non-slip surface so you can work out in confidence on this aerobic stepper. The height of the stepper can be adjusted from 10cm to 15cm to 20cm, so you can alter the intensity of cardiovascular exercises and maximise your workout sessions on this fitness step. The professional-style exercise stepper lets you do a great range of drills to target your whole body, and is strong but lightweight for your confidence and for easier storing.