DescriptionThese whistles are made of premium metal material which are strong and durable. no easy deformation, a long period to use. they are also keyrings which you can tie it on your backpack or bags etc. It is also a funny toy for kids.Features-Color: Silver -Material: Metal -Size: 4.50X2.00X1.70cm/1.77X0.79X0.67inch -Made of premium metal material, durable and safety for long lasting use. -High frequency design make it more practical. outdoor use tool that you need. -Lightweight and equipped with key chain, easy to carry and can be your good helper. -An essential piece of safety equipment for you during outdoor activities. -Wonderful gift to your friends, family, camping lovers, travel lovers, etc.