This is an AJW (Acid Jazz Works) 6H mouthpiece for a small-bore trombone. It is new and unused. Please refer to the photos for details. 【Description】 AJW stands for Acid Jazz Works. They sell trumpet and trombone mouthpieces and other products, with the collaboration of Mitsukuni Kohata, a professional trumpet player with many years of experience. AJW provides trumpet and trombone mouthpieces that can meet the needs of high-level amateurs to professional players. AJW trombone mouthpieces make it easy to cover high ranges, which is hard to imagine from the mellow low range they produce.