Each weight piece measures 1.75" in diameter and 1.75" in height. All tail weights come in silver and you can spray paint to match your tail if you like or you can leave them silver. All weight options that you purchase will be divisible in half pound increments. Pictured is 2 pounds of weights (4 half pound pieces). The screw will drop down through a small hole that was built into your tail extension (be sure you selected “setup for weights” when ordering your tail). Then you will slide the amount of weights onto the screw that you need and secure with the wing nut. For added security, we recommend taping the wing nut to the screw with electrical tape or putting a rubber band on the screw below the wing nut to keep the weights from coming loose.