Internal Halyard Revolving Truck with Ball BearingsInternal Halyard Revolving Truck used on all internal halyard systems with revolving truck. Fits flag pole shafts with 1-1/4 in. pipe threads and tapped for 1/2 x 13NC or 5/8 X 11NC finial. Recommended on flag poles up to 30 ft. Made in the USA. Painted to match all finishes except satin.