Aurora Tinder HOT Solar Fire StarterTinder storage box that can start a fire using solar energy. The inside top cover is also a signal mirror. 2 1 2" diameter. Machined solid aircraft aluminum construction. No moving parts. Does not use flint, fuels, gases, or batteries. Works great with wild tinder such as dry leaves. A small piece of charcoal briquette ignited and then transferred to a bundle of toilet or tissue paper also works well. Box includes a small piece of tissue to use as