Features: Brand new and high quality These sports communication whistle is craft with stainless steels materials, ensuring durability and reliability for various communication need. With their clear and penetrating sound, these multifunctional whistle is essential for coaches, referees, and teacher in any instructional setting. Suitable for a range of activity, from training to supervisions, these practical whistle ensuring efficient communication in any environment. Whether you're leading a class and organizing activity, these light weight whistle provide practical and quick access to effective communication. Designings for long timing performances, these quality whistle is a valuable asset for anyone in need of practical communication. Specifications: Materials: Stainless Steels Color: As The Picture Shows Package Weight: about.45g Whistle Size: about.4.5x1.4x2cm/1.77x0.55x0.78in Package Includes: 4Pcs Referee Whistle note: Please allow 1-2cm error due to manual measurement. Please make sures you not mind before your bid. Due to the differences between different monitors, the picture may not reflect the actual colorful of the item. Thanks!