These are for a metal bifold door. No markings.

A quick learner from Fairfax Virginia says:
Posts are are 4.5" long and 1/4" at the top where the cap goes and 5/16" on the rest of the post body where it goes through the nylon guide bushings.

All of the springs are good. It is the nylon guide bushings and caps that I need.

Nylon caps fit on 1/4" dia
Nylon guide bushings have 5/16" dia hole and fit into a 1/2 x 1/2 hole in the door
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Paul from SWISCO responded:

Thank you for your patience in this matter. This is an old Peachtree bi-fold door that uses our 21-101 nylon guide pin cap, 21-153 snap in nylon pin guide, and 21-149 top snap in pin guide. Look this hardware over and see what you think.

A quick learner from Fairfax Virginia says:
Thank you very much. It looks like what i need. I will pass this info on to my customer.
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