Maratac titanium lighters use the same mechanism as the classic Zippo with some definite improvements. The screw cap along with the O-Ring keeps the lighter fluid from evaporating while also creating a waterproof seal. Unlike butane models, these lighters will work at any altitude and the flint can be sparked to create fire even when out of fuel. Burns up to 15 minutes and can also be used as an emergency candle. 2.75" x 0.75". Made in the USA.