French Horn Mouthpiece Romeo Brass Zen x Ben This is the Zen x Ben signature model by Tsutomu Maruyama, the Symphony model with an American shank. I purchased it, but I haven't used it much, so I'm putting it up for sale. I apologize, but I only have the box. I will pack the mouthpiece in bubble wrap inside the box and then ship it in another box. This model is suitable for large orchestra performances and is attractive for its powerful f-ff sound. You can blow with confidence without the sound opening up. Also, the sound quality is calm, and the blowing feel is stable, making it an attractive model. Inner diameter: 18.0mm / Throat diameter: 4.0mm