This is a 29mm diameter single use motor. It is ready to fly and doesn't need any motor hardware. You will still need a retaining system.
Because this motor is considered “experimental" by Tripoli/AMRS you will need to be level 2 certified with Tripoli, AMRS or ARA to purchase it.
G8 Super Thunder™ DMS™ (Plugged)
Motor G8 Manufacturer Aerotech Type Single Use (Disposable Motor System™) Flame Super Thunder™ (ST) Quantity per pack 1 motor Diameter (mm) 29.0 Length (cm) 15.3 Ejection Delay (s) None (Plugged) Average Thrust (N) 8.1 Maximum Thrust (N) 14.9 Burn Time (s) 16.6 Total Impulse (Ns) 136.4 Total Mass (g) 154 Propellant Mass (g) 61