The Estes 1602 B4-4 Model Rocket Propellant 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 3.5 ounces, including the engine. Each package includes 3 engines, 3 igniters and 4 igniter plugs.
ATTENTION: Residents of California, New Jersey, Rhode Island and North Dakota please review the Terms of Sale for state specific restrictions on model rockets.
ATTENTION: Estes products may contain chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.