I have an application in mind that requires some tapered tubing. Specifically, I need to be able to go from about 1 1/2 inches down to about 1/2 inch over a foot or so. Nothing about this is critical. It needs to be aluminum for heat transfer ability, and about .1 thick or so for ability to withstand pressure up to about 150 psi or so.
The closest starting point I can think of is an aluminum baseball bat. If I buy two bats and cut the tapered parts out, I'd have what I need, an inner part and an outer part that nest together.
Bats are fairly expensive though, so I'm looking for a better option. Any ideas?