MATERIAL:PE Plastic COLOR:Assorted colors. Randomly color send. FUNCTION:Bam thunder sticks can make the atmosphere more intense.Football Noisemakers Party Favors. Great to cheer on your star player or show your team spirit OCCASIONS:These are fantastic for birthdays, weddings and events decorativce .Have a try to give your lovely a surprise ! PACKAGE:100 x Thunder Sticks Wide Application: These are fantastic for birthdays, weddings and events decorativce .Have a try to give your lovely a surprise ! Usage method: Fist, Open outer flap,insert straw into inter tube Second, Blow air into straw Third, Take out straw when sticks air inflated.Thunder sticks can self-sealing. At last, you can make noise when you hit them against each other. NOTICE: (1) Note they do not stay inflated for more then a hour. (2) Because of transportation, materials and other issues, there will be some defective products.The defect rate is five percent , this is a normal loss.