The buntline blocks (red arrow) guide the buntlines to the mast where they are directed down by double blocks on each side of the mast (green arrow). The buntlines are made from 1/16" dacron single braided rope. The four lines are tied to a single 1/8" line (blue arrow) for easier handling. To give a better idea of the scale, the mast is 3/4" in diameter here and the center of the yard is 5/8". The brass blocks are 3/8" long. The blocks are tied to brass eye screws with waxed dacron cord.