Flat Aluminum Dual Frequency Survival Whistle Double Tube Outdoor Survival Survival Whistle Equipment

Name: high frequency double tube survival whistle Material: aluminum alloy Weight: about 13.5g Color: silver, gold Packing: opp bag individually wrapped Peak volume: about 120dB Surface treatment: oxidation + sandblasting Specifications: length 55mm × width 15mm × thickness 8mm [Features] 1. Lightweight and equipped with a keychain for easy carrying; 2, the caliber is larger, the whistle is louder, and the outdoor must-have items must be saved; 3, aluminum alloy material, the surface is anodized technology, color, no fading, longer service life.