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Material: Aluminum Alloy

Specification: Length without rings4.6cm* Mouthpiece outer diameter: 0.9cm

【Features】Double-layer anodic oxidation treatment, resistant to fading; compact and sturdy, ideal for outdoor travel to help you confirm your direction, avoid getting lost, and find your companions, etc. It can be used as a decorative item on a keychain; Elegant and personal, this aluminum alloy whistle has a sharp and loud sound, with a long transmission distance; It can help you confirm your direction, avoid getting lost, and find your companions when you are outdoors.