(Product Name): Portable sealed waterproof small whistle

(Material): aluminum alloy

(Specifications): length 77mm

(Color): red, green, blue, pink, silver, black. There are 6 colors.

(Features): the middle part of the spin can be opened, equipped with waterproof storage, which can also store some small pieces of paper and so on, can be used as outdoor survival, training purposes, above a small ring, can hang a key ring or hanging in the child Or pet neck

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Post Length: 77mm * Diameter: 12mm