We get it. Some decisions can be almost impossible. Like choosing whether to own the iconic Wavemaster punching bag or the infamous BOB XL. Well, now you can get both for the price of one. We like making things easy. Since the wavemaster & BOB XL use the same base, just swap the tops when you're ready to change up your training. BOB XL - Body Opponent Bag A great training tool for any martial art. He is sturdy enough for kickboxing, muay thai, karate, taekwondo, and other striking arts, and his features allow him to be used for tactical training arts such as jeet kune do and krav maga. Manikin: 30" x 20" x 10" Base: 24" Diameter x 19.5" Tall Approx. 270 lbs. when filled with water. Adjustable height: From 60" to 78" Original Wavemaster Replacement Top The Wavemaster is adjustable! Whether you’re working oblique kicks or head kicks, you can use the Wavemaster. The bag section of the Wavemaster is 24” tall with a 13” diameter. This is the top only, not the full unit.