Oasis Instrument Case Humidifier, Oasis Item OH-6.
Two powerful neodymium magnets are inserted in the seam of the humidifier - the magnets attach to either a steel clip or a stainless steel strip with adhesive backing (both are provided with the humidifier). The humidifier can be used in instrument cases such as violins, violas, cellos, mandolins, ukuleles, or guitars by attaching the stainless steel strip to the inside of the instrument case with the double sided tape. The steel clip and strip give the user a wide variety of ways to attach the humidifier to the case. Includes 10 cc syringe for distilled water filling control.