This mouthpiece was included when I purchased a Besson tenor horn, so it doesn't have a box. I used a different mouthpiece from the time of purchase, so I only tried this one out briefly, and then stored it at home. There are no dents. It was stored in the included zip bag, which has some slight tarnishing. It should become clean if polished. - Model: Alto horn mouthpiece - Material: Brass - Finish: Silver-plated Besson 4