_x000D_ _x000D_These whistles are made of premium material which are strong and durable. No easy deformation, a long period to use. They are also key rings which you can tie it on your backpack or bags etc. It is also a funny toy for kids. _x000D_ _x000D_Features _x000D_ _x000D_-Color: Random Color _x000D_-Material: Plastic _x000D_-Size: 4.50X2.30X1.50cm/1.77X0.90X0.59in _x000D_-Professional and practical whistle for referee and school athletic meetings. _x000D_-Classic appearance design, designed for instructor, trainers, and athletes well. _x000D_-High-class material guarantee long service time, enjoy your own tempo and honor. _x000D_-Suitable for racing, running, horse racing, swimming, exercising, competition, etc. _x000D_-Can be the perfect gift for your friends who are the referees or instructors.Packing list24 x Whistles