Material: 304 stainless steel Size: 4.7cm/1.8in*1.5cm/0.59in / 1.83"*0.58" Color: as shown in the picture 1. Made of 304 stainless steel, sturdy and long-lasting: This whistle is made of 304 stainless steel, which can withstand more harsh environmental tests and is not prone to rust or damage. 2. High-quality whistle sound, clear and loud: The whistle adopts a professional design inside, and most importantly, it has excellent sound quality with a clear and loud whistle sound. 3. Compact and lightweight, easy to carry: The whistle is small and lightweight, making it very convenient to carry outdoors, such as camping, hiking, and exploration activities. 4. Multi-purpose application, professional choice: This whistle is widely used in various fields such as police, referee, and players, and is a reliable professional equipment. 5. Safe and reliable guarantee: The whistle is very safe to use, without any harmful substances, and has reliable quality. It is a trustworthy purchase option for you. Package includes: 1 x whistle. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.