The PowerMax Vertical Jump Trainer is constructed of aluminum, providing a lightweight, reliable solution for any vertical training needs. Tip and Roll wheels provide easy transportation while the rubber adjustable feet offer a secure base that won't mar your floor. Foldable Weight Arms on both ends of the base allow for weights to be added for more stability. Colored vanes provide quick and easy measurement readings. Height ranges from 95" to a maximum height of 146". 1 Year Warranty.