The base provides a stable foundation for the uprights. It's often made of heavy steel and may include anchor points or wheels for easy movement and secure placement.  

Crossbar Supports : These are mechanisms on the uprights that hold the crossbar. They are designed with specific shapes or notches to ensure the crossbar rests securely but will fall off if touched by the jumper, indicating a failed attempt.  

Height Adjustment Mechanism: This allows for precise and easy adjustment of the crossbar height. Modern stands often use a crank system, a pulley system, or an internal mechanism for smooth and accurate adjustments in small increments.  

Measuring Scale: A clear and accurate scale, usually in both metric (centimeters) and imperial (feet and inches) units, is marked on the uprights to indicate the exact height of the crossbar. This ensures accurate measurement for official records.