the Eb (BE1077) model is free blowing with an ease of tone production and an even response. The mouthpipe is carefully positioned to give the optimum playing comfort and the valve technology produces complete accuracy and reliability. A ligtweight design makes thesetubas exceptionally easy to hold and carry, with their depth and quality of tone capturing the essence of the legendary Besson sound.Key: Eb• Bore: .650 (16.52mm)• Weight: 5.6kg• 3 bottom sprung stainless steel valves• Non compensating• 2 water keys• Finishes: lacquer or bright silverplateoutfit