It's probably 1/8" OD copper tubing, which should be available at just about any professional-level auto parts store. Don't waste your time looking at Auto Zone, Advance, etc., they just won't have it! NAPA, maybe!
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!