The Boveda Metal Holder 1 Packet is a great way to store your humidifier packs while saving space. The long-lasting metal holder easily mounts to your humidor’s lid (or side for a cabinet humidor) and includes two mounting options: a magnetic or a Velcro® mounting kit. It’s designed to hold one size 60 Boveda pack. You can even add it to your travel humidor by simply cutting a cavity into the lid’s foam padding and placing the holder in it. Can be used on wood, plastic, or glass humidors. Humidity pack(s) sold separately.