Cox 21-717 21-767 . They have the same number however the appear different

A home owner from USA says:
December 14, 2015
My Cox rollers have the same number on them but they don't look the same.
What parts should I order
User submitted photos of a closet door roller.
Profile picture of Tom
Tom from SWISCO responded:
December 16, 2015
Check out our 23-070 and 23-086, these look like they might be good matches. The 23-086 may be the better choice since it has a ball-bearing wheel, which we feel operates more smoothly.
A home owner from Yonkers NY says:
December 12, 2017
Thank you so much for your response and expertise. I will certainly try to find out if this will work.
Mirror Wardrobe Door Roller, Concave
Mirror Wardrobe Door Roller, Concave
23-070
$6.78
Mirror Wardrobe Door BB Roller, Concave
Mirror Wardrobe Door BB Roller, Concave
23-086
$8.42
Sliding closet mirror door rollers and tracks
Sliding closet mirror door rollers and tracks
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