Improve foot speed, quickness, and knee lift. 2 height adjustments - 6" and 12". Collapsible bungee cord will give when hit  or stepped on for added stability. Made of strong 2" hard PVC tubing. Rust proof. Use indoors or outdoors. Assembly required. 15' L x 5' W with 12 squares 30" each. 33 lbs. Frame Only.