These little magnetic Nano Geocaches stick to any magnetic surface and are bound to stump your fellow Geocachers. Each container has a magnet, a log, and an O-Ring to keep the logbook dry inside the threaded lid! Every pack comes with 3 extra log books (6 in total). The containers come in Black, White, Green, and Brown. Note: the color of the tweezers matches the color of the purchased containers, you can message us for specific color choices. Each container is 20mm tall and 14mm in diameter.