1602 B4-4 Standard Engine (3) HAZ
This is the B4-4 Standard Model Rocket Engines/Motors from Estes.
Suitable for Ages 10 & Older with Adult Supervision for Those Under 12.
FEATURES: Single stage engine Standard engine designed for flights in rockets weighing less than 3.5 ounces, including the engine Engines tested and certified by the NAR Easy to use and comes with clear instructions
INCLUDES: Three B4-4 Engines Three Igniters Four Igniter Plugs
REQUIRES: Model rocket Adult Supervision for Children Under 12
SPECS: Length: 2.75" (7cm) Diameter: .69" (18mm)