The perfect size for young martial artists, the Powerline Wavemaster Jr. is ideal for punching and kicking, constructed with twice the amount of durable foam as the Kid Kick Wavemaster. The base fills with sand or water and is rounded for easy relocation. This bag has four height adjustments from 37 inches to 52 inches (floor to top of bag) and weighs approximately 170 lbs. when filled with water.