Humboldt Humidors are humidity-controllable boxes that lockout excess air and moisture to create the perfect environment for flowers. -- Humboldt Humidors are crafted with one simple goal in mind: allow you to properly store flowers so you can enjoy longer. -- Each Humboldt Humidor is constructed out of high-quality mahogany and includes 12 (4oz) jars, 12 natural bamboo lids, a removable curing grid, durable lock and key set, stickers for proper labeling, and a built-in hygrometer. -- Mahogany Construction with Luxury Finishes Internal Quadrant Locking Hinges (Prevents Lid Hypertension) 12 (4 oz) Glass Jars 12 Real bamboo lids Removable Curing Grid Durable Lock & Key Set Reusable Stickers for proper labeling Reusable Personal Rating System on every Jar Hydrometer Dimensions 10″ x 8″ x 5″