Aluminium Metal Emergency Survival Whistle Fire Survival Whistle

The whistles are made out of a strong aluminium alloy, and the painted surface goes through an oxidation process to prevent it from chipping and rubbing off. It's very sturdy but light. Put a whistle on your keys, your backpack or your gear bag and forget about it until you need it. Not only suitable for emergency situation in camping, hiking, boating and other outdoor activities, but also referee, coach, lifeguard, pet dog training, school sports, competition, etc. 1 3/16"L x 5/16"W