B4-4 Rocket Engine (Sold in store only)

Estes - 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