This fitness stepper is made of high-density ABS material supporting up to 550 lbs, with a non-slip textured surface and rubber feet for stability. Features 2 adjustable height settings (4" and 6"). 16" square platform, lightweight and portable for easy storage. Suitable for endurance training, cardio, lunges, push-ups, and sit-ups. | Anysun | | Adjustable Workout Aerobic Stepper in Fitness & Exercise Step Platform Trainer with 2 Risers | Red | Best Buy