B4-4 Standard Engine

The Estes B4-4 engine is single stage engine designed for model rocket flight. This engine is a standard engine designed for flights in rockets weighing less than 3.5 ounces, including the engine.

ENGINES FOR MODEL ROCKETS

3 - B4-4 Engines
4 - Starters
4 - Plugs

PLEASE NOTE: This item will ship by US Postal Service only. You MUST HAVE a physical mailbox or post office box for delivery.

ATTENTION: Additional State Specific restrictions may apply.

Model rocketry is a legally permitted activity in every state in the U.S. However, four states, (California, New Jersey, Rhode Island, and North Dakota), have laws and regulations that specify certain age or permit requirements.