JUN’S Renaissance Brassworks GIGAMASTER 3-2 Gold Plated Trumpet Mouthpiece Heat Treated, Hairline Finish Compared to other brands, the rim diameter is equivalent to a 5C-3C size. The cup depth is equivalent to what is generally recognized as a B cup, but it is an original design. Unlike deeper cups that can tend to have blurry outlines or be difficult to handle, this mouthpiece is finished to accommodate a wide range of expression. Suitable for solos, ensembles, and orchestras, it can be used in various situations. Enjoy our company's unique three-dimensional sound. - Model: Trumpet Mouthpiece - Material: Gold Plated Thank you for looking.