Bruno Tilz M.8 tuba mouthpiece, made by the German mouthpiece specialist Bruno Tilz, and a heavy type made in Neustadt/A. - Brand: Bruno Tilz - Model: M.8 - Manufacturing Location: Neustadt/Aish - Finish: Gold Plated Diameter: 32.5mm Bore: 7.0mm Thank you for viewing. This is a tuba mouthpiece made by Tilz, a German mouthpiece specialist. It's an older piece, so it has some wear and tear, but there are no dents in the shank. The size is M-8, the appearance is similar to the Daum model, and it has considerable resistance, so it's suitable for powerful players.