The ALPHA Gear Adjustable Hurdle 4 Pack is a stand out solution. The simple twist design allows for the hurdle to be set up at 6 inches or 12 inches, giving you ultimate control and versatility. The 2 tone design makes is easier to instruct players what to do at what hurdle. You may have 2 of the upper yellow hurdle set up at 6 inches and the upper blue hurdles set up at 12 inches. This will assist the player in the exercise and also keep them thinking about the next hurdle.