The Step Home Workout System (#F1004) Adjustable from 4 to 6 to 8 heights * Platform: 28.75 L x 14.25 W x 4 H * Support blocks - 14.25 L x 10 W * Compact version of the original step - perfect for home / clinic use * Safe - shock-absorbing non-slip surface * Lifetime manufacturers warranty * No assembly required *