※This item is at the workshop, so please contact us before purchasing. Instrument Innovations Rotary Valve for Trombone Instrument Innovations Tenor Trombone Rotary Valve INCLUDES 3 VALVE FERRULES For tenor trombones. Includes 3 dedicated valve ferrules. This valve is often used for valve replacements and customizations on instruments like Bach. It's a larger valve, like the one on the Greenhoe in the example photo, and is known for its good airflow. Thank you.