Century is now offering a new Sparring BOB. It is made of a more pliable rubber than the original! Unique design takes up less space than original Able to fit on the adjustable Wavemaster base Skin is constructed of high-strength plastisol Inner cavity is filled with high-density urethane foam Base can be filled with water or sand and weighs approx. 270 lbs 7 height adjustments from 60" to 78" Base included One year limited warranty Made in the USA BOB is a registered trademark of Century LLC. The BOB design is a registered trade dress of Century, LLC. BOB© 2003 Century, LLC. U.S. Patent #5,624,358