Historical information
Insulates electrical wire/cable which is attached between the narrow and wide ends of the 'bell' shape (in the groove). Screwed onto the cross arm of a power pole. Non conductive so electricity doesn't short out to the ground.
Significance
Used on power poles in the Kiewa Valley.
Physical description
White porcelain bell shaped insulator with an indent between the wide open end and the narrow closed end. The indent is for the wire/cable to be attached. The wide end is open with a white porcelain cylinder inside narrowing to thread for screwing, in the narrow section.