Height Adjustable:3 different height adjustment from 4 - 6 - 8 inch to change levels easily, help you intensify every workout and push yourself to reach new fitness heights Anti-slip Design: Non-slip & non-stick surface and shock absorbing design makes platform safer and easier for you to move. Anti-slip rubber is used under each platform and riser to protect the floor and keep it in place Durable Material: The platform is made of solid recyclable high density polyethylene. Supports up to 440 lbs with impact resistance Effective Exercise: This aerobic step can be used to target your hamstrings with alternating lunges, very helpful in strengthening your chest and back by pushups