●?? Backboard: The 29.1"*18.5" basketball board is made of high quality clear polycarbonate, which is shatterproof and durable. ●?? Dual Spring Rim: The rim is made of solid stainless steel with a diameter of 17.7 inches (for pitching 2-7 balls) and is equipped with dual buffer springs for quick rebound of the basketball rim. ●?? Suppoet pole: The suppoet pole is made of stainless steel tube with a diameter of 1.69", it is sturdy and durable, the height of the basketball hoop is adjustable from 61"-120" (rim to the ground) and there are 10 adjustable gears. ●?? Base: The 30.7"*18.5" basketball hoop base is made of high-strength polyethylene, which can be injected with sand or water as a counterweight. The triangular support utilizes the principle of triangular stability, which greatly improves the stability of the basketball hoop. ●?? Portable basketball stand: easy to install, the base is equipped with rollers, which can easily adjust the position of the basketball stand, suitable for various venues.