Home / Guitar / Guitar Accessories / Planet Waves Acoustic Guitar Humidifier PRO Planet Waves Acoustic Guitar Humidifier PROGHS208.50 The Planet Waves GHP Guitar Humidifier PRO is for acoustic instruments, protecting them in even the driest conditions. The Humidifier PRO allows for longer periods between refills and increases protection. Planet Waves Acoustic Guitar Humidifier PRO quantity Add to cart SKU: PLAWAHUP Category: Guitar Accessories Tags: humidifier, planet waves Product ID: 6422