Made in the United States from durable, recyclable high-density polyethylene Includes circuit-size grey platform with overall dimensions (28.5" L x 14.5" W x 4" H) and approximate stepping surface of 22" L x 11" W. Also includes (2) black risers Platform features grooved, nonslip top and supports up to 275lbs Four nonskid feet on each riser and platform prevents sliding or scratching floors Vary workout difficulty by adjusting platform height from 4" to 6" using risers