3 5/8” overall. Gun metal gray anodized aluminum body with threaded cap and lanyard hole that reveals storage area for tinder or purification tablets inside handle. O-ring sealed. Waterproof. Features a replaceable 5/16” ferrocerium and magnesium rod that burns at nearly 5500°F (3000°C), even works when wet. Fits in knife sheaths designed with ferro rod loop. Includes black nylon lanyard and extra O-ring.