Holton Farkas #4 finger key for exchange valve
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Holton Farkas french horn finger key (lever) for french horn. #4 Lever for thumb exchange valve.
Compatible with: Holton Farkas models: H177,H178,H179,H180,H181 (and their 200 series) as well as the H378.
This item does not include spring or string retaining screw.