Stable Base: Robust sand or water filled base to ensure stability. The 12 suction cups underneath offer this punching bag with stand a strong suction on the floor.Rebound Speed Ball: The reflex bag helps you increase your punch velocity and muscle elasticity.360° Reflex Spar Bar: With a 360° rotating reaction rod, this boxing equipment is great for training your reaction, accuracy, and agility.61"-81" Adjustable Height: With a simple turn knob, this speed punching bag accommodates a wide range of sizes from youth to heavyweight.Boxing Gloves as Gift: The included gloves allow you to hit the bag with power while avoiding serious injury to the wrists, forearms, and shoulders. Overall Dimensions: 34.75"W x 19"D x 61"-80.75"H. Applicable Player Height: 47.25"-74.75".