Test vertical jumps, with measurement heights between 1.3m and 3.8m and increments of just 1cm, for granular measurement. The plastic vanes are multi coloured, for more accurate reading, with less mistakes. There are 10 vanes per colour group. Height adjustment is done easily, via hand-twist bolt. The stand is made from painted steel for stability, with a weighted base (water filled), with wheels for moving it around. This particular model uses a pole to reset the vanes after each jump.