4oz. Tinder storage box that can start a fire using solar energy. The inside top cover is also a signal mirror. 2.5" 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. Comes with natural Citronella incense for fire starting material that keeps bugs away. Includes instruction sheet. Bulk packed.