Outdoor sports titanium alloy whistle high decibel waterproof

This titanium alloy whistle features a one-piece dual hole design, with a wall thickness of 1cm, making it sturdy, durable, and resistant to rusting. The dual hole structure makes the sound clear and loud, even when wet, it can be blown normally. Equipped with hanging holes for easy outdoor carrying, it is a practical travel companion.

Overall length:43mm (1.692in)
Width: 20mm (0.787in)
Thickness: 10mm (0.393in)
Material: Titanium 
Weight: 22.7g (0.800og)