Description: 【Quality Material】: This whistle is made from 304 stainless steel, ensuring durability and longevity. It is resistant to rust and corrosion, making it great for outdoor use. 【Dual Tube Design】: The whistle features a dual tube design that produces high decibel sound, making it loud enough to be heard from a distance. 【Versatile Use】: Ideal for various applications such as firefighting or refereeing sports games. Its loud sound ensures your signals will not be missed in noisy environments. 【Compact Size】: With dimensions of 5.6x1.95cm/2.2"x0.77" and a thickness of 0.7cm/0.28inch, this whistle is compact and lightweight, easy to carry around with you wherever you go. 【Package Includes】: You will receive 1 stainless steel whistle, Each rope whistle comes with a buckle loop for easy use and to prevent loss. Specification: Material: Stainless steel Size Chart: Size: 5.6cmx1.95cm/2.20inchx0.77inch Thickness: 0.7cm/0.28inch Package Includes: 1 Whistle(5 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.