The 3-in-1 Plyo Block, incorporating all the benefits of our Soft Plyometric Boxes into one. You get three heights from one piece of equipment – 51cm (20in), 61cm (24in), 76cm (29in). Official demensions used at the CrossFit games. The Plyo Block is made from a high-density foam and covered with durable, non-skid vinyl. It absorbs the impact of landing and eases the shock on your ankles, knees and hips. It is also perfect for saving space and introducing beginners to plyometrics at your facility.