Training & Behaviour Pure copper bird training products, outdoor rescue whistles, treble wild field survival equipment
[Specification] (long) 48mm x (diameter) 10mm * (wall thickness) 1mm
The whole whistle is made of pure copper! Top grade!!! High purity brass, the key component of sound production, is also made of pure copper, which will never deteriorate.
[scope of application] outdoor survival, self defense lifesaving, EDC player collection, etc.