The King 3BS trombone is built with a classic jazz trombone style in mind. It features a .508” bore for excellent control in all ranges of the instrument. This model features a beautiful sterling silver bell. A vintage balancer and deluxe style bell engraving are included on this trombone. A sleek hard shell case protects this trombone when not in use. These king small bore straight trombones have set the standard in jazz performance for generations.