Champion Sports Plyo Boxes are a must-have training tool for explosive jump and speed training, and a variety of plyometric drills! Made of welded tubular steel, this plyo box feature a slip-resistant, rubber-coated plywood landing surface, and the legs are constructed at an angle for extra stability. 15" X 15" Top, 24" h. Length: 21"; Width: 21"; Material(s): Plywood; Rubber; Steel; Playground/Gymnasium Sets Type: Plyo Box.