Your cigars need to be kept in a constant level of humidity to maintain an optimal freshness. With this humidification system from Xikar, you will be able to keep a humidor holding up to 100 cigars at a constant humidity of 70%. Using Xikar's PG solution the crystals can be refilled when needed to always keep a constant moisture in your humidor. A magnetic attachment system will firmly hold this humidification system on the inside of your humidor's lid. Adhesive is included so that you can apply this humidifier to the inside top of any humidor.