Adjustable Humidifier and Hygrometer Kit for Musical Instruments (Brown / Gold) By Humistat Helps prevent cracking, warping, shrinking, sticking keys and pads Enhances tone and slows aging Refillable, reusable, low maintenance For Cellos, Basses, Bassoons, Guitars, Accordions, Bagpipes, Dulcimers and similarly sized instruments Made in USA