Description from RailroadWare
Antique Insulator Pendant Lights
Glass insulators were first produced in the 1850s for telegraph lines, then for telephone and power lines. Insulatorlight Pendant (Original) comes with a grounded fixture per NEC standards, ready to hang with glass insulator, 5' round 3 wire cord black, 130v 40w incandescent reflector bulb, black ceiling canopy kit, hardware & instructions. Insulators are cleaned, drilled, polished, fixtured and ready to use.