I just dug up my wire... Its fromthe jewelry and craft section. I think they use it to make strings of beads and such. anyway the manufacturer of this:
Hirshberg Schultz & Co., Inc.
Union, NJ 07083
the lable on he package says:
"plastic coated wire"
Its very flexible - its definetly not something I'd use for any kind of stuctural parts as it bends very easy. But bent and glued into place as piping works very nicely, as long as the piping is not "free standing". by this Imea glued along most of its length. the wire I picked up is pretty fine - about 1mm thick I'm not sure what other thicknesses this company makes.
Jedi Dade