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On 21 Feb 2005 at 2:44, David V.N. wrote: > Yes,they make structural shapes in copper. > http://www.ksmetals.com/HobbyMerchandisers/jumbo_metal.asp That looks nice, but I don't know if I've seen that particular display. I've seen the others, but they don't include the copper tubes. Their smallest Cu tube is 5/32 and .014" wall, and they don't specify the hardness. It comes in 36" lengths. The copper refrigeration tubing (50' rolls) and automotive tubing (25' rolls) comes in 1/8" dia, .030" wall and is annealed. Of these, I'd say that the 1/8 automotive tubing looks like the best choice, but the hobby tubing looks like it would be easiest to find. Thermocouples would also be easy to find. -- Jim Adney jadney@vwtype3.org Madison, WI 53711-3054 USA ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~