These are are parts I need?

A quick learner from Florida says:
I can see Stanley on one of the parts! The hinge point.

Need track also hinge point and guide
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Paul from SWISCO responded:

We carry three lengths of the Stanley style bi-fold track which are the 21-450 (24"), 21-452 (36"), and 21-455 (72"). The height of the track is 1/2" and comes with the 21-174 roll guide and the 21-175 pivot bracket. You will also need to purchase the 21-286 snugger to help keep the door in the closed position. Look these parts over and see what you think. 

Bi-fold Door Repairs
Bi-fold Door Repairs
GUIDE
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