If you are looking for an inexpensive humidifying unit with a capacity up to 50 cigars, look no further. This humidifier is designed to automatically regulate the humidity to 70-75%. Just charge this unit with Propylene Glycol solution and all you have to do is place it inside the humidor with its metal plate mounting and close the lid. Made in USA. Size: 2-3/8" diameter by 5/8" thick.