12" COPPER HEATED TRANSFER LINE

VINTAGE Heated Sample Lines (also known as Heated Transfer Lines) for early Perkin-Elmer Gas Chromatographs. The banana measures roughly 7.5mm OD and about 19mm length. The ID of the reverse end is 11mm tapering down as it goes inward. Gemini reported this is likely a "7.0mm Bullet or power" - JUMBO BANANA PLUG / GIANT BANANA PLUG MALE TO JUMBO BANANA SOCKET FEMALE

Below is the digested summary from gemini. I trimmed it so you can select what you want to use.
______

These parts are definitely Heated Sample Lines (also known as Heated Transfer Lines) specifically for early Perkin-Elmer Gas Chromatographs.

Part Category: Heated Bellows Assembly / Accessory Heater.

Function: These lines were used to connect the "injector" to the "column" or a "column" to a "detector". They kept chemical vapors hot so they wouldn't condense back into liquids as they moved between different parts of the machine.

Electrical Connection: The single silver banana plug provided the power. In older instruments like the Model 154, the machine's body acted as the ground, so you only needed one wire to plug into the "Heater" socket on the back or side panel.

Mechanical Connection: The hollow hex nut is a standard 1/4" or 1/8" compression fitting. A tiny tube carrying the gas would run through the center of the bellows.

Part Numbers: Look for stamps starting with "008-" or "0254-".

Catalog Code: Some were listed as "NEE154" in older accessory guides. 1.1" OD - JUMBO BANANA LIKE KEYSTONE 6073 OR KEYSTONE 6075 - OR EF JOHNSON 108-0770-001 OR 108-0771-001 OR 108-0760-001