This is a re-release of the discontinued Silky 51D long shank model, which is easy to play in tune and has rich overtones in the mid-range. Response is also good. It's a beautiful item, as it was purchased new and only test-played, but please understand that it is a used item and consider purchasing it. Silver-plated euphonium mouthpiece, model 51D. - Brand: JK Yacht Car - Model: Orchestra 51D - Type: Euphonium Mouthpiece - Size: Large shank - Material: Silver-plated Thank you for viewing.