Yamaha YSL-445 GE II, Bb tenor trombone@+The trombones of the Yamaha 400 series impress with a beautiful full tone and an even response. They are easy to play and look just like the professional Yamaha trombones, aside from the price. The bell size and bore are the same as in the 'Pro' models, and the trombones of the 400 series have also received many handcrafted details. All models have a 214.4 mm gold brass bell, which guarantees a warm, full sound and sounds wonderful in every concert hall. In addition, these trombones offer an incredibly accurate intonation, a very light traction, a light response and a pleasant playability.The YSL-445GE has a ML bore and is suitable for any music style., ML bore: 13.34 mm (0.525""), Gold brass bell: 214.4 mm (8-1 / 2""), Nickel silver slide, Lacquered, With case and 48 mouthpiece