Material: The vertical jump tester is made of high-quality steel material, and its sturdy structure ensures that it can withstand the impact of repeated jumps. The scale on the stainless steel shaft of the vertical measuring instrument is automatically cut and drilled by laser, with precise length and proportion. Every 10cm is a gear that can be adjusted and viewed Effective training: By jumping and touching the yellow vernier, you can accurately measure your jumping height and improve your vertical jumping ability. The vernier that are disrupted during the jumping process can be reset using a reset lever for your next test Adjustable height: The vertical jump measuring instrument can be adjusted every 10cm between 5.6-11.8 ft to achieve the height you want to test. The movable yellow leaves are placed at a position of 1cm to achieve precise jumping measurement Stable base: The base of the floor standing tester is made of thickened steel and weighs 33 pounds, which can make the chassis heavier and less prone to shaking. You can also add extra weight to the base to make the independent measuring instrument more stable, even when tested by multiple people, it will not shake Suitable for various scenarios: The vertical jump measurement device can be placed outdoors, at home, in schools, gym, and sports centers for youth physical fitness testing. It is tool for volleyball and basketball training, often suitable for hitting, adjusting, and agility training to continuously improve oneself Package: During transportation, the vertical jump measuring instrument will be divided into two boxes and delivered to you separately. The long tube box of the height tester is 61 * 2.3 * 4.3 inches, approximately 7.7-8.8 pounds, and the triangular frame box of the height tester is 35.8 * 2.7 * 25.6 inches, approximately 24.2 pounds Lock Dynamometer Sport Coaches Referees Kid Measurements Portable Gym Lounge Adult Exerciser Vertical Height Waterproof Rebounder Cardio Dunk Leaping Fits Indoor Adults Schooling sports surveying Universal Athletes Athletics