• PVC
• Whistle for teachers-- in addition, it can make a loud, crisp sound by hand squeeze, you can use it easily and in any situation,camping whistle
• Teacher whistle-- making a loud sound by hand squeeze, it is suitable for outdoor survival, sports competition, etc,sport whistle with bracelet
• Emergency outdoor whistle-- made of good material, the whistle is solid and decorative, to deform and ,hand whistle for coaches
• Wistle-- best your teachers, referee, teachers or your friends who are a big fan of outdoors activities,whistle tool
• Outdoor hand whistle-- widely used as a keychain decoration can also be used for referee whistle,red whistle