These were made by Pyrex. They are Arial 3 phase insulators. There is only a few left in the air do to the grid being updated so many times over the years. However, there is a few here and there in the south jersey area. Aka the penguin shaped insulator. I do own one, they are much larger on the ground lol.. The next time I am in this area I will get a better shot. Until then, this one from my sun roof will have to do..