This is a green glass insulator. The text " 8 B" appears on the side of the insulator. The insulator measures 4" (h) x 3.25" (dia).
Note: This may be 1996.4.2 (TTempleman 01/12/2018).
Lexicon
Nomenclature 4.0
Nomenclature Primary Object Term
Insulator
Nomenclature Sub-Class
Electrical System Components
Nomenclature Class
Electrical & Magnetic T&E
Nomenclature Category
Category 05: Tools & Equipment for Science & Technology