This is the F50-9T 29mm x 98mm Single Use Composite Model Rocket Motor from AeroTech Consumer Aerospace. FEATURES: Blue Thunder- Produces a bright violet-blue flame with a minimum of exhaust smoke These motors provide a higher level of thrust than White Lightning or Black Jack motors of the same total impulse Single stage Instruction sheet included INCLUDES: One F50-9T 29mm x 98mm Single Use Composite Model Rocket Motor SPECS: Propellant type- Blue Thunder Primary use- Single stage Motor diameter- 1.13" (29mm) Motor weight- 2.9oz. (83g) Maximium liftoff weight- 14oz. (397g) tlh 2/25/11