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 Actual Size: 16" Square x 12"H Adjusts height from 4" to 12" Includes 53 minute All-Step video featuring the premiere step aerobic instructor Cathe Freidrich Lifetime Warranty