KLB Sport 29" Aerobic Freestyle Workout Step W/2 Risers (Blue & Green) plastic Imported Dimensions: 28.4Lx14.4W x6H; Supports up to 500 pounds; Safe non-slip surface Adjustable Heights: 4 to 6 Made from Recyclable High Density Polyethylene Money Back Guarantee If You Will Be Not 100% Satisfied with Your Purchase Non-marking Feet for Use on Almost Any Type of Floor Including Wood, Tile & Carpet.