Cast aluminum construction with aluminum sheave(s) on 1/4" aluminum axle(s). The truck body rotates on 26 stainless steel ball bearings on cast races. The DUAL SHEAVE TRUCK can be used on flagpoles with up to a 4 inch O.D. top. The bottom has 1 1/4" male National Pipe Thread (NPT) to scew into the top of your flagpole or use a truck adapted with the threading. The top of the spindle is tapped 1/2"-13NC as standard to accept a ball or eagle finial. Maximum recommended halyard size is 5/16".
