Lot of four 8-in long chrome 1-5/8 in outer diameter piping for custom use. We bought a box of these when Dixie International went out of business. They have part number MC5304 on the package but we could not find any research using that number.  They are chrome piping but I don't know what it's purpose is. They are 8 in long, 1 and 5/8 in outer diameter and 1.41 in inner diameter. That makes it about .135 wall thickness. Keep in mind that this is older inventory and the chrome plating is not in perfect condition so if you're building a show bike I would not recommend this. Not unless you're going to chrome plate it again when you're done.