RA54L2, Retainer Assembly, 54mm, L2
29mm Motor Retainer
54mm to 29mm Motor Mount Adapter - MMA3
Two simple steps transform a standard engine into a D size. Insert a standard engine into the adapter, and insert the adapter into a rocket. 3 adapters per pack. Reusable.
Two simple steps transform a mini engine into a standard size. Insert a mini engine into the adapter, and insert the adapter into a rocket. 3 adapters per pack. Reusable.