Durable polyethylene Step ® is adjustable from 4" to 6" to 8"H. Set includes one 4"H Step® platform and four 2"H risers. Platform features shock-absorbing nonslip ribbed rubber surface and nonskid rubber feet for stability and floor protection. Can also be used as a muscle-sculpting bench. 250 lb weight limit. 43"L x 16"W x 4"H.