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. Length: 15"; Width: 15"; Material(s): Plywood; Rubber; Steel; Playground/Gymnasium Sets Type: Plyo Box.