Size: Height 1.8 inches (4.5 cm) x Diameter 0.3 inches (0.8 cm) (Diameter); Material: Aluminum alloy; Weight: Approx. 0.2 oz (5 g); Easy to carry and can also be used as a keychain or fashion accessory. A must-have item for mountain climbing, trekking, excursions, and winter sports. It can help your surroundings when it comes to disaster or danger, increasing your survival rate.