Gold-finished Mr. P 8.8H mouthpiece, designed to improve sound quality. - Model Name: Mr. P 8.8H - Brand Name: POTENZA MUSIC (now Liberation due to production location change) - Color: Gold I used it once, but I'm selling it because I've become busy with work and haven't had a chance to play. The box shown in the photos is from Canadian Brass, but this box is not related to the product. Quoted from the Liberation sales site: ・8.8 For B.C. tuba This is a U-cup mouthpiece boasting the largest size. Although it's a large mouthpiece, it has a solid resistance, and it's surprisingly easy to control. It's a model designed to be used with rotary tubas, but it's a mouthpiece used on all kinds of tubas. The base model is PT-88. Rim Inner Diameter: 33.mm Throat Diameter: 8.1mm There are heavy types (those with H at the end) for all of them. ・Heavy types are also called Mr. P Premium in some regions.