Free blowing with a rose brass bell for a lovely warm sound, the Premiere Tenor Trombone is manufactured from high quality materials, plays incredibly well and is comparable to instruments many times its price. Specification Rose brass bell Brass Body Clear lacquer finish Cupronickel slide Mouthpiece Bell Diameter: 8.44"/214.4mm Bore size: 0.547"/13.9mm Zero-gravity ‘backpack’ hard foam case Canvas covered, plush lined with shoulder strap Accessories: Gloves, cleaning cloth, cleaning rod