Sunny Health & Fitness Foam Plyo Box with Adjustable Heights and High Weight Capacity $159.99 Make sure this fits by entering your model number. 3-In-1 Ploy box: supports 3 different heights at 30, 24 & 20 inches. With the ability to change the height variable you can avoid training plateaus and continue to improve your explosive performance. Heavy duty frame: ensure a safe and effective plyometric training session with the durable slip resistant vinyl covering and ability to support up to 440 lbs.