Achieve total-body fitness with help from The Step Circuit Size Aerobic Platform. The included risers add variety to your workout with multiple slanted positions perfect for adding intensity to push-ups, sit-ups, lunges and more. Burn more calories the higher you step with 4"and 6" platform height options. The platform is crafted from durable, recyclable high-density polyethylene that supports up to 275 pounds, and the 4 nonskid feet help prevent slipping.