Features Yamaha YSL-882GO F-Attachment Trombone Professional Xeno Series Key of Bb -- .547" Bore -- 8 2/3" Gold Brass Bell Clear Lacquer Finish -- Open Wrap Includes Deluxe Case & Peter Sullivan Signature Mouthpiece Description Product Description Xeno F-Attachment Trombones, with the assistance of key orchestral players and soloists throughout the world, represent some of the best instruments using the most advanced design technology available. These trombones offer a rich, projecting sound with a solid core and a wide spectrum of tonal colors.