 A 4-inch PVC pipe is cut to a height that is level with the top of the side boards and is placed in the center of the box.The boxes are placed 25 ft apart (measured from the center of each pvc pipe) on level ground, preferably going North and South to avoid sunlight distraction for one side/player.Six steel or brass washers are used (3 for each team), having (2-inch outer diameter and 1-inch inside diameter and approximately -inch thickness.