Once used to hold power cables to telephone poles, these repurposed glass insulators now make handsome lighting shades. Made from cast glass in the United States until the 1970s, they are thick and heavy for their size, many with cast lettering to indicate their brand. Intermediate base sockets hold a 25 or 40 watt incandescent reflector bulb, sold separately.
Insulators are 3.75" diameter by 4" or 4.25" height
Ceiling canopies are 5" diameter