The Estes A10-0T engine is a booster stage engine designed for model rocket flight and has to be used with a mini engine. This engine is for flights in rockets weighing less than 4 ounces, including the engines. Each package includes 4 engines, 4 starters and 4 plugs.

ATTENTION: Estes Industries, LLC requires all purchasers and users of Estes® Model Rocket Engines to adhere strictly to all applicable local, state, and federal laws, regulations, and safety standards. The user assumes all responsibility for the safe and lawful use of Estes® products. Estes Industries, LLC expressly disclaims any and all liability for personal injury, property damage, or other loss resulting from the misuse, improper handling, or unauthorized application of its model rocket engines.