3 in 1 Plyometric Box: 20"x24"x30" Flatpack Three sizes in one box! 20", 24", and 30" Crossfit, MMA, Aerobic conditioning, plyometric exercise, athletic training, jump box, step box Box jumps, step ups, box dips, curls, squats, inclined/declined pushups, planks Custom made in a professional cabinet shop. Made in USA using quality 3/4" domestic plywood