The GR TRB500GMKII Ida Maria Grassi Bb/F trombone with open F attachment is an intermediate-to-advanced instrument designed to provide precision, ease of play, and versatility, making it ideal for advanced students and musicians in band and orchestral settings. The open F/Bb trigger allows for smoother intonation extension and greater playing flexibility, facilitating complex technical passages.

The brass body with lacquered finish ensures durability and stability, while the 214 mm yellow brass bell delivers clear, powerful, and even projection. The 13.89 mm bore provides steady airflow and responsive play across all registers. The nickel-plated inner and outer slides ensure smooth action, durability, and optimal instrument control.

The trombone comes with a professional foam backpack-style case for safe and practical transport and includes a mouthpiece and cleaning cloth. A well-balanced and reliable instrument designed to support the advanced student or experienced musician with precision, comfort, and high-quality sound.