Ultra Rare / Hauck? Oboe Tube - Nickel 47mm, 3 Used Very rare oboe reed tubes, believed to be Hauck. The engraving has worn off, so I honestly can't be certain... Nickel, 47mm. In my personal opinion, it produces a very gorgeous and refined sound. I think it's a perfect match for Marigaux. Please consider this if you can make your own assessment based on the above information.