Boveda Humidity Control | 58% | 67g | 12pc DisplayHumidipak uses 2 way technology ensures relative humidity of 58% (+ 1%). It establishes ideal humidity within 24 48 hours, is FDA approved, environmentally friendly (all natural no harmful chemicals), and can be disposed of without a guilty conscience. Boveda Humidipak lasts approximately 6 months (Humidipak will begin to feel granular inside when it needs replacing). The countertop display has 12 pieces. For use w 6Ltr & Mega CVaults Highlights 12