The Bach Stradivarius 43 Bb Trumpet has the brightest tone of the Stradivarius line of trumpets. The shape of the #43 bell taper offers a slightly brighter and broader sound. Like all Bach Stradivarius trumpets, the 18043 comes with a standard construction #25 leadpipe with a .459" bore, bringing depth and color of sound, even intonation, and excellent response. This horn is perfect for the performer that plays a majority of jazz music.