The Anti Gravity Crossbar, the newest addition to the Gill line, features our durable pulltruded fiberglass rod paired with state of the art ends. These ends have a half moon profile which lowers the center of gravity of the bar. The result is a crossbar that is more stable allowing your athlete to defy gravity and jump to new heights. Meets High School, NCAA, and IAAF specifications. Crossbars are not guaranteed against breakage. IAAF certified.