The Estes Rocket Engine Chart 1605 B6-2 Engines (3 Pack) is a single stage engine designed for use with Estes model rockets. This engine is a standard size engine (2.75" long x .69" diameter) for use in model rockets weighing less than 4.5 ounces, including the engine. Each package includes 3 engines, 3 igniters and 4 igniter plugs.
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