Century is now offering a new Sparring BOB174. It is made of a more pliable rubber than the original! Unique design takes up less space than original BOB174 Able to fit on the adjustable Wavemaster153 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 BOB174 is a registered trademark of Century LLC. The BOB design is a registered trade dress of Century, LLC. BOBcopy 2003 Century, LLC. U.S. Patent 5,624,358