One piece cast aluminum gold ball/truck combination. This was designed to go slip over the top of outdoor flagpoles up to 3" in diameter. This unit has a pulley that your flagpole rope will go through as well as the decorative gold ball to give the top of your flagpole a beautiful appearance. It is held in place by allen set screws to insure it remains solid to your flagpole. A great way to combine a separate truck assembly and traditional ball top into an attractive single casting. Comes in two different sizes - 4 1/2" and 6 1/2". Designed for flagpoles with the halyard on the exterior of the pole. Please see product details of each size below.