This is the F26-9FJ 29mm x 98mm Single Use Composite Model Rocket Motor from AeroTech Consumer Aerospace. FEATURES: Black Max- Provides the high visibility tracking of dense black exhaust Motors give your models lower acceleration and longer powered flight than White Lightning or Blue Thunder motors of the same total impulse Provides slightly higher acceleration than White Lightning Propellant Single stage Instruction sheet included INCLUDES: One F26-9FJ 29mm x 98mm Single Use Composite Model Rocket Motor SPECS: Propellant type- Black Max Primary use- Single stage Motor diameter- 1.125" (29mm) Assembled weight- 3.6oz. (101g) Maximium liftoff weight- 12.3oz. (349g) tlh 2/25/11