Willie's Willie's Trombone Mouthpiece MASSONG 4TS For Large Tenor Trombone, GP finish Rim Diameter: 26.00mm Throat Diameter: 7.16mm Similar Size to Other Brands: Bach 4GL Gold Plated Thank you for viewing. I believe it's in quite beautiful condition, but please check the photos for the condition. The box is damaged. My personal impression is that it's like a European version of a Greg Black. It doesn't take too much breath, yet it produces a thick tone. I feel it's a mouthpiece that plays efficiently. Please feel free to ask any questions.