Here is a triple pole set not far from my office that contains a very large "instant" collection of 10" suspension disks. There are both gray porcelain and aqua glass units in use here. As best as I can count from the picture, there are 155 disks holding up 3 wires, about 90 are glass and the rest are gray porcelain. In the background is a large steel tower with even more suspensions in use.