[superman365]

does anyone know if this stuff is seamless?

http://www.homedepot.com/h_d1/N-5yc1v/R-100400405/h_d2/ProductDisplay?catalogId=10053&langId=-1&keyword=electrical+conduit&storeId=10051#.UMiLy5PjluE

 

[NightKnight]

I think it is cast actually. Not positive though.

 

[NaturalFork]

I have seen both types at home depot. You really have to inspect the pipe in person I have found,

 

[danny0663]

Go to your local metal supply store, and grab aluminium tubing .... you won't have to worry about weight or corrosion.

 

[neondog]

There is some high falutin' metal conduit that has a coated interior to protect the wire that runs through it. I've only heard about it and I heard that it is well over two dollars for a ten foot piece.