【Brand and Model】 Trombone mouthpiece by Karl Hammond Design. It features a design that emphasizes sound quality. 【Size and Material】 Size is 12ML, made of metal for durability and long-term use. 【Sound Quality Features】 Designed to provide an HD sound experience and enhance musical expressiveness. - Brand: Karl Hammond Design - Model: Trombone Mouthpiece - Size: 12ML - Material: Metal - Features: HD sound experience - Condition: Good I am selling this because it doesn't suit me, after playing it about 2 or 3 times. The condition is good, with some minor scratches, but there are no issues with playing. Thank you for looking.