Achieve total-body fitness with the Step Original Aerobic Platform - Circuit Size! The Step is a great home-fitness tool for beginners to experts and is customizable for a variety of aerobic and strength exercises.This set includes a black nonslip platform and two original grey risers to create the foundation of any workout program.. The original circuit-size platform features a 28.5" L x 14.5" W x 4" H stepping surface with a grooved, nonslip surface for added safety.. Burn more calories the higher you step with 4" to 6" platform height options using the 14.5" L x 9.5" W x 2" H risers.. Model number: F1065. Made in USA.