This is the A10-3T Mini Model Rocket Engines/Motors from Estes.
Suitable for Ages 10 & Older with Adult Supervision for Those Under 12.
Single stage engine
Mini engine designed for flights in lightweight rockets
Engines tested and certified by the NAR
Easy to use and comes with clear instructions
Four A10-3T Engines
Four Igniter Plugs
Adult Supervision for Children Under 12
Length: 1.75" (4.4cm)
Diameter: .5" (13mm)
WARNING: Flammable. Read instructions before use