The Firefly 2 Top Lid (black) is an Original Equipment Manufacturer (OEM) product intended for use as a replacement for the top lid that originally comes with the Firefly 2 Vaporizer. It is made from magnesium alloy and is coated with a layer of borosilicate glass. It features a quartz window, which lets you see the process of vapor production. This featured Top Lid is black, but other colors are available including blue, gold, jet black, red, and white, and even stylish patterns, such as the oak and zebra wood. If you have scratched or damaged your original top lid, this product is the perfect replacement.