This Box is durable, stable, easy to use & assemble, which is a perfect choice for gym center with numerous users and ideal for you to do jumping exercises at homeSave more space with one box only that can be used to vary your desired jump height to all 3 height levelsThere is an internal bracing (on 3 largest sizes) for maximum strength; guarantees for a non-slip surface on the top and to support heavy-weight athletesPlyometric moves are the ones in which the strength, elasticity, muscle innervations get used to jump higher - throw farther - hit harder. Perfect for step-ups, box squats, CrossFit work and MMAFeatures pre-drilled holes for quick assembly and rounded corners where you can put maximum efforts without getting hurt. Poly-coated outer layer to protect the exterior