If you need a way to maintain a constant humidity in your humidor, this Xikar humidifier is perfect for you. Capable of maintaining a 70% humidity in a humidor that holds up to 250 cigars, this humidification system won't disappoint you. It firmly attaches to the inside of your humidors lid with a magnetic attachment system. Filled with Xikar's PG solution, this crystal gel works to keep a 70% relative humidity at all times and can be refilled with more solution when needed to continue working.