The Estes B4-2 engine is single stage engine designed for model rocket flight. This engine is a standard engine designed for flights in rockets weighing less than 4 ounces, including the engine. Each package includes 3 engines, 4 starters and 4 plugs.

 SHIPPING INFORMATION: 
"Mini" through "D" Rocket Engines must be shipped ground and will be shipped by *USPS (5 - 15 business day service) or optional **UPS Hazmat (2 - 5 business day service).  UPS charges us a $37.00 fee for this Hazmat service which we have to pass on to the customer!   If you want your order to go via **UPS Hazmat, please order one UPS Hazmat Shipping Service from the "Related Products" below.
 If shipping **UPS Hazmat, only one **UPS HAZMAT charge per order is required! 

*USPS (United States Postal Service) Ground Parcel Post: Takes 5 - 15 business days and requires no extra shipping charges. (Only mini through D can be shipped this way!)
**UPS Hazmat: ships regular UPS ground Hazmat and will arrive in 2 - 5 business days depending on your zone! UPS charges us a $37.00 hazardous material fee which we have to pass along! (This is above and beyond any shipping charges. ) If UPS is your choice please see "Related Products" below to order the UPS Hazmat shipping.
Sorry for any inconvenience this may cause but we have only these shipping options due to federal law!

Estes model rocketry is recommended for ages 10 and up with adult supervision for those under 12. Unless otherwise specified, all models require assembly. Tools, construction and finishing supplies sold separately. In order to launch, a launch system, model rocket engines, starters and recovery wadding are required - sold separately-unless otherwise specified.