Silver-plated simple trombone mouthpiece with a cylindrical inner design. - Brand: GRIEGO - Model: GP - Material: Silver-plated - Accessories: Box - Design: Simple circular design - Inner Shape: Cylindrical Thank you for viewing. This is a Griego trombone mouthpiece, model "GP". It's for bass trombone and is silver-plated. It's the model of Mr. Gary Pagano, formerly of the St. Louis Symphony. The inner diameter is 28.575mm, and it features a thick rim and a very stable sound. This is one of the earliest Griego mouthpieces, with the red box. The same model is still available, so there's no change in the specifications, but collectors will appreciate its rarity. I've used it a few times at home for testing, but not in concerts. I will ship quickly and carefully. Trombone Bass Trombone Trombone Mouthpiece Griego Griego GP