Our Flagpole Truck ST-1 Series has cast aluminum construction with a 1” outside diameter nylon pulley on a 3/16” stainless steel axle. Designed to slip over the top of the flagpole and be secured by one 1/4” stainless steel set screw. The top is designed to accept an ornament with a spindle threading of 1/2” as standard but can be supplied with other sizes of threading if desired. The ornament is secured to the truck with a size 10-32 stainless steel pan head screw. Maximum halyard diameter is 1/4”.