Single Pole: Electrad Porcelain
3 3/16" X 1 5/16" (81mm X 34mm)
(top embossed) ELECTRAD PAT PANDING RADIO / ANT / GND / LIGHTNING RADIO ARRESTER |
3 3/16" X 11/16" (81mm X 18mm)
Picture courtesy Mike Green |
These single pole versions were used to connect a single wire to ground. This is blue glazed dry process porcelain.