The Estes B4-4 Rocket Engine 3-Pack is an 18 mm, single-staged engine designed for model rocket flights. This engine is a standard engine designed for flights in rockets weighing less than 3.5 ounces, including the engine. Each 3-pack package includes: 3 engines 4 starters 4 plugs 1602 B4-4 Rocket Engine 3-Pack is compatible with majority of Estes rocket kits including: 1225 Alpha 1292 Wizard 1261 Baby Bertha 1946 Boosted Bertha 1948 Big Bertha 1949 Viking 2008 Generic 2X 2021 Cadet 2056 US Army Patriot 2092 Mongoose 2169 Dragonite 2178 Hi-Flier 2452 Athena 2483 Phantom Blue 7000 Bull Pup 12D 7220 Crossfire ISX 7245 Comanche-3 7259 Nike-X 7281 Corvetter 7284 Starship 7291 Space Corps Centurion  ATTENTION: Residents of California, New Jersey, Rhode Island and North Dakota please review the Terms of Sale for state specific restrictions or Click Here for State Specific Restrictions.
