R 5050 glass bushing used to insulate high voltage switches in substations or powerhouses.
Example of usage seen here: [id=224527531]
If I'm not mistaken, these were determined to be a Brookfield product. Condition is excellent, just the usual roughness at the top of the pinhole from removal of the glass plug, otherwise just a couple flea bites.
Asking 80.00+shipping (from Canada) for this piece, PayPal (net of fees) preferred. Please contact me with any questions. Inquiries welcome.