Cast aluminum construction with cast nylon pulley. Designed to slip over the top of a flagpole and secured with stainless steel set screws. The top of the truck is designed to accept an ornament with a spindle threading of 1/2"- 13NC, such as our ball tops. The ornament is secured to the truck with a stainless steel screw. Below are the most common flagpole trucks. If you do not see the size you need, please contact us. The 2" size is a replacement part for our popular 20' Sectional Flagpole. The size listed is the diameter of the flagpole the truck will fit. Example: The 2" size truck will fit a pole with an outside diameter of 2".