DESIGN: The Adjustable Aerobic Step Platform is one of the best ways to up your cardio game The aerobic Step platform is easy to store without taking up much space Adjustable risers lock in under the platform, allowing you to start with an easy workout and up the intensity by raising the platform Can support over 400 pounds and has a safe shock absorbing, nonslip surface SPECS: 26": (26 X 11 X 4 inches), can raise platform from 4" to 6" 31": (30.7 X 11.4 X 4 inches), can raise from 4" platform to 6" or even 8" WARRANTY: This product is backed by a 90-day manufacturer's warranty period