The Humid-EZE Disk Humidification System is a great way to maintain your cigar humidor humidity levels with very little effort. It's very unique because you simply remove the seal and place in your humidor for perfect 70% humidity. It's an all natural water based, chemical-free system that requires little to no monitoring. Each disk will humidify up to 25 cigars. If you have a large humidor, simply add more disks to compensate (100 cigars = 4 disks). They will last up to 30 days and then you throw them away and add new disks. That's it and yes, it really is that simple.