The revolutionary MUMETAL-CARBIDE Composite Engineer II Volcano: ACCURACY UNDER ADVERSE CONDITIONS. 45mm patented antimagnetic Mumetal-Carbide case with thickness of 12.4mm. COSC Chronometer certified. Able to withstand 5000Gs and 100m of water resistance. The night comes alive with its 15 H3 micro gas-tubes. Equipped with rubber strap and canvas strap in a special box set.