Details Features Zirnbauer valves bore size 11.2 mm progressive trigger on the 3rd valve slide Nickel silver slides tuning bows made from red brass Options bore size in 11,2 mm or 11,5 mm heavy version in 11.2 mm combined double trigger for the 1st and 3rd valve slides bell out of yellow brass or red brass bell with nickelsilver rim bell thickness of 0.45, 0,5 or 0.6 mm Overblowing key for C and A finish of polish brass, silver or gold plated prices price list some references SWR-Orchester Freiburg Opera de Rouen Oper Zürich Tonhalle Orchester Zürich