This is a professional-grade Bach Stradivarius trombone model 42G with hard case. The trombone features a large bore and is made of high-quality brass, specifically yellow brass and gold brass. This trombone is perfect for players of all levels, from beginners to experts, and is ideal for both classical and jazz music. The set includes a mouthpiece and hard case for easy transportation and storage. Whether you're performing on stage or practicing at home, this Bach Stradivarius trombone will deliver exceptional sound quality and performance.