This is an E♭ tuning slide for a Yamaha F single horn. Even when the notation is in E♭, you can play with the usual fingerings. Overall, there is some lacquer peeling and oxidation. Also, the slide portions of the tuning slides show wear from use. This was used on the Yamaha YHR313, an older single horn model. Please note that we have not confirmed whether it can be used on the current YHR314ii model.