The Silver Ball Ornament for In-Ground Flagpoles is a heavy-gauge flush-seam aluminum ball with a long lasting silver anodized finish. The 4 in. ball ornament is mounted on a 1/2 in, NPT threaded, aluminum spindle. A jamb nut is provided for use in firmly securing the ball to the truck assembly. Perfect for your outdoor, ground set pole. See below for compatible pulleys and other related products.