bi-fold doors bottom guide

A handy person from New Jersey says:
August 11, 2020
The bi-fold door lower guide needs to be replaced. the guide is similar to your bifold door cap. Part no. 21-103 . The apart I have is 3/8" where the 21-103 is 1/2". Is there barrel of 3/8".
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Bob from SWISCO responded:
August 17, 2020

Check out our 21-106 Cap. This has a top with an outer diameter of 3/8", while the hole to accept a pin is 3/16" in diameter. Let me know if this matches. 

Bifold Door Pin Cap, National
Bifold Door Pin Cap, National
21-103
$1.02
Bifold Pin Cap, 3/16" ID
Bifold Pin Cap, 3/16" ID
21-106
$0.85
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