This is the Sonic Igniters from the Pro Series by Estes. Suitable for Ages 10 & Older with Adult Supervision for Those Under 12. FEATURES: Igniters used for the Pro Series motors INCLUDES: Four Sonic Igniters COMMENTS: Due to small parts that could cause a choking hazard please keep away from children 3 years of age and younger For your safety and enjoyment, always follow the NAR Model Rocketry Safety Code while participating in any model rocketry activities