bottom of bi-fold door

A quick learner says:
No markings found - pretty heavy duty piece on bi-fold door which is missing the piece or wheel that goes inside the track. Thank you.
Thumbnail of the uploaded file named Closet roller
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Casey from SWISCO responded:

Hello,

Depending on the type of wheel that your roller uses, I would recommend starting by comparing the specifications of the convex 23-081 and the concave 23-086 to your assembly. We'll include the specifications from our product pages below. Thanks for posting! 

Dimensions for 23-081
Dimensions for 23-081

Alternate view of 23-081
Alternate view of 23-081

Detail of 23-086
Detail of 23-086

Alternate view of 23-086
Alternate view of 23-086

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