This is a mouthpiece designed from scratch by SMK Craftworks, for horn players, by a horn player. It has a comfortable feel and produces a good sound. [Brand] SMK Craftworks [Model Number] SMK-750R-BR [Shape] Cup Inner Diameter: 17.5mm Throat Diameter: 4.0mm Cup Shape: U-cup Depth: Shallow Rim: Rounded Shank: 3/100mm [Surface] Solid Brass Finish (Limited Quantity) The solid brass finish will change color over time. Please note that the luster shown in the photos may have faded depending on the time of order. Free shipping nationwide *Shipped via Yu-packet Post Mini