3in1 Plyometric Box: 12"x14"x16" Flatpack EXT Three sizes in one box! 12", 14", and 16". Exterior grade plywood for outside use. Crossfit, MMA, Aerobic conditioning, plyometric exercise, athletic training, jump box, step box Box jumps, step ups, box dips, curls, squats, inclined/declined pushups, planks Flatpack, ships flat to save on assembly and shipping costs. Includes assembly screws, wood glue, and easy to follow assembly instructions. Made in USA using quality 3/4" plywood. Custom made in a professional cabinet shop.