Daddario PW-GH Gitarrenbefeuchter
D'addarío GH Humidifying System, Guitar Humidifiers, Especially for acoustic guitars and steel-string guitars, Prevents cracking in the body and warped neck, Easy to remove, The humidifier is simply inserted into the sound hole of the guitar without additional holders or clips, Releases moisture to the instrument slowly and evenly, To refill, lid must be opened with 2 hooks (press down below the cover and the cover is already removed - quite simply)