The dkn studio aerobic step has a large durable platform constructed from reinforced plastic with a non slip surface a huge number of exercises including ones for improving cardiovascular fitness can be undertaken on this piece of gym equipment and its height can be adjusted by the 4 risers so you can choose a workout height of 10cm 15cm or 20cm the exercise stepper is a professional style accessory and despite its sturdy build it is lightweight for ease of use and storage