The Bach Stradivarius Artisan A47 trombone is a straight trombone (no valve), with standard yellow brass gooseneck, yellow brass, hand-hammered Artisan bell with flat rim and soldered steel wire, reverse main tuning slide with yellow brass crook, and a .547 bore hand slide with yellow brass outside tubes and bottom crook. The Bach Stradivarius trombone 85-year tradition has been in bands and orchestras around the world for decades. Today, The Artisan Trombone Collection, takes the Bach Stradivarius trombone to the next level. With an intense focus on precision, The Artisan Trombone Collection offers superior performance. The result is endless possibilities for even the most discriminating artist. This instrument comes outfitted in an elegant case that combines classic Vincent Bach styling, contemporary materials and exceptional design.