The Estes 1/2A6-2 engine is single stage engine designed for model rocket flight. This engine is a standard engine designed for flights in rockets weighing less than 2 ounces, including the engine. Each package includes 3 engines, 4 starters and 4 starter plugs.PLEASE NOTE: This item will ship by US Postal Service only. You MUST HAVE a physical mailbox or post office box for delivery.

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