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. Stepping Surface: 14" x 40" Adjusts from 4" to 6" to 8" Supports Up To 200 lbs. Warranty: Manufacturer's 90 Day Limited