B4-4 Engines

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