The Western Humifier® is designed to maintain the freshness of up to 200 cigars with minimum maintenance. Fill ONLY with approximately 4 oz. pure distilled water. Depending on the size of your humidor, the condition and number of cigars, and the climate where you live, the Humifier® can last weeks without refill. This state-of-the-art humidification system features a high impact ABS case with high power magnet fastener. Dimensions: 6.75" x 2.5" x .75" (171mm x 64mm x 19mm).