Name: double tube survival whistle
Model: AT6637
Material: stainless steel
Specification: full length 5.7cm width 1.8cm thickness 0.8CM
Weight: 25 grams
Decibels: 150 decibels
Package size: 6x2x1CM
Scope of application: outdoor survival and other scenes
Color: black silver
Features: outdoor make a living whistle blow easily as high as 150 db. Double hole and double tube design high quality stainless steel material