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.
G80 Blue Thunder™ DMS™
Motor G80 Manufacturer Aerotech Type Single Use (Disposable Motor System™) Flame Blue Thunder™ (T) Quantity per pack 1 motor Diameter (mm) 29.0 Length (cm) 12.4 Ejection Delay (s) 14 Average Thrust (N) 86.7 Maximum Thrust (N) 117.9 Burn Time (s) 1.5 Total Impulse (Ns) 132.2 Total Mass (g) 128 Propellant Mass (g) 63