Clear and green glass strain insualtors from Sediver, France. These are used on the Northwestern Energy 500kv lines in Montana. Glass colors were mixed when line was upgraded from 230kv to 500kv in late 70's. Both styles are available. These strain (suspension) bells are rated at 40,000#.

Great screen saver, but perhpas a little busy... if you want more shots of our training with linemen, contact me.