Estes A8-3, B6-4, C6-5 Mini Bulk Pack - 9 Engines / Motors with Starters
Brand: Estes

This combo pack provides 3 each of the most popular Estes engines for use in most model rockets. The A8-3 is used for first flights and small flying fields as you get used to how your rocket will perform and where it will land in your flying field. The B6-4's will almost double your altitude. The C6-5's will provide almost double the altitude that the B6-4's can provide. Refer to the instructions or packaging that came with your model rocket for the engines you should be using. Estes model rocket engines are the standard in the model rocket industry for easy to use and reliable propulsion for your model rockets.

All the engines you need for low, medium, and high altitude model rocket flights
The best way to get engines in bulk without having to buy 24 of them.
Estes engines are the model rocket industry standard