SHIPPING INCLUDED The Step is America's original aerobic fitness step system and is widely used by individuals and over 18,000 health clubs. The Step has a patented design for adjusting and stacking platforms together making it suitable for beginners and advanced steppers alike. The Step aerobic activity involves low-impact, high-intensity exercise - recommended by physical therapists and fitness professionals. Non-Slip Surface On Platform That Supports Up To 200 lbs. Stepping Surface: 14in. x 40 in. Adjusts from 4 in. to 6 in. to 8 in. Includes 53 min. All-Step Video Featuring The Premiere Step Aerobic Instructor Cathe Friedrich Manufacturer's 90 Day Limited Warranty