strut is part of:

strut contains:

Full expansion for strut:
    80%  2x2 Plate w/ Bottom Fins/Struts
    80%  2x5x2 Strut w/ Sleek Conical Engine
    50%  2x2x2 Round Space Landing Pad
    20%  1x5x3 Fin (1x4 base/1x2 top)