repair of mirrored sliding doors

A handy person from Mount Laurel, NJ says:
March 16, 2021
My sliding mirrored closet doors do not slide properly after 25 years of use. I believe the wheeled device shown in the pictures above have worn out. I have 2 closets so I would need 8 replacement devices.

Also, I want to replace the bottom tracks on both closets. The tracks are white. one closet is 4 feet wide. The other is 5 feet wide.
Thumbnail of the uploaded file named IMG_4372.jpeg
Thumbnail of the uploaded file named IMG_4370.jpeg
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Bob from SWISCO responded:
March 17, 2021

Hello there. This roller looks like our 23-041. Compare and see if you agree. For tracks that work with this roller, see our 23-240 48" track and 23-241 60" track. 
Mirror Wardrobe Door Roller Assembly
Mirror Wardrobe Door Roller Assembly
23-041
$9.70
48" Sliding Mirror Door Bottom Track
48" Sliding Mirror Door Bottom Track
23-240
$20.45
60" Sliding Mirror Door Bottom Track
60" Sliding Mirror Door Bottom Track
23-241
$22.87
Sliding closet mirror door rollers and tracks
Sliding closet mirror door rollers and tracks
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Sliding Closet Mirror Door Rollers & Tracks
Sliding Closet Mirror Door Rollers & Tracks
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