Titanium Alloy High Audio Single Tube Whistle Outdoor Survival

Name: Titanium alloy single tube blowing whistle 
Model: KS010        
Color: titanium primary color/sandblasting/stone washing/blue/green/gold       
Material: titanium alloy                                                   
Specifications: Φ9.5*48mm                                             
Weight: 5.3g/5.4g/5.6g
packaging: simple, plastic bag, 500 pieces/box

"Single tube burst design" high frequency penetration, up to 120 dB, wide coverage
Titanium alloy material, waterproof corrosion resistance, beauty and texture coexist
Integrated molding,no ball design water into dust can be blown