The STX Stallion U 550 lacrosse head is built for the best with several key upgrades. STX has an updated the throat design to help strengthen the only imperfection of the original Stallion. The Stallion U 550 is a Lacrosse favorite because of its weight, strength and stringability. The pocket in a Stallion can truly fit any player. Most of the Stallion U 550's we have strung so far have a mid to high pocket which allows for the ball to sit perfectly in the shooting or passing position.