Willie's Custom Brass POLARIS 1G Large Bore, Silver Plated SP ★ Cup Diameter: 28.50mm ★ Throat Diameter: 8.20mm ★ Mint condition, only test-played once after purchase. European-type mouthpiece. Light blowing feel with a bright and fine tone. Also suitable for changing the character of powerful American instruments. Supervised by Toshihiro Shirahama (Associate Professor, Kurashiki Sakuyo University Graduate School). * Body shape may vary slightly depending on the manufacturing period. Please check the photos.