Stainless steel 316

[AntarcticPilot]

It's further away than you probably would prefer, but Mackay's in Cambridge supply all sorts of metal cut to length and with reasonably priced fabrication. I just checked and stainless tube is available from them.

 

[barberose]

all the same bro, I use Inox304 now and I paint it. cheaper

 

[penfold]

Why would you paint it? It won't rust, especially if polished.