These arresters I have mounted on a pole in my stairway. The left side shows the arresters with their protective covers on. The right half of the picture shows without. I have listed them going from the left side of the pole down and then the right side of the pole down. same for the other half of the picture. These would have been mounted outside of the building. Automatic Electric Co arrester, below that Cook Electric Co arrester, front of pole: Reliable Electric Co arrester, Below that Newer type 2000H reliable electric Co arrester, Back of pole another Cook arrester. Neat stuff. Hope you enjoyed these photos. Take care stay safe and be well to all.