This item has special shipping requirements due to federal law. All orders including Mini through D engines and/or igniters are shipped ground hazmat by USPS Parcel Post. Delivery may take 5 to 12 business days or more with no extra shipping charges. For faster delivery (approximately 5 or less business days), UPS Hazmat ground shipping is available for an additional fee. Free shipping promotions do not apply to orders with engines and/or igniters. Please see our shipping information page for more details. Brand new design igniters. Great for composite motors like the Estes Pro Series II and Aerotech motors. 4 igniters per pack.