Thank you for viewing. This is a tuba mouthpiece, the Yamaha Sergio Carolino model. I used it with a YFB-821. I dropped it once from the shank, so there is a slight distortion, but it doesn't affect its use. I had left it unused for quite a while, so I polished it, but there are still some stains that I couldn't remove completely. Please understand that this is a used item, and only purchase if you are okay with that. I will pack it in bubble wrap and ship it in a box.