Replacement Mirror Door Rollers

A home owner from Walnut Creek Ca says:
April 30, 2017
I need to replace Contractors Wardrobe rollers for sliding mirror doors. I would like four new rollers. The wheels have worn down on the original rollers. I ordered four of these new rollers from you recently, but I was shipped the wrong ones. They look nothing like these and do not fit. Please advise.

Thanks
Dave
User submitted image of their closet hardware.
Profile picture of Tom
Tom from SWISCO responded:
May 3, 2017
Hey, Dave. I'm sorry to hear you were shipped the wrong rollers. Was it an entirely different part number from what you ordered? I can't see any orders associated with your email address. However once we know more information we would of course be happy to fix it for you and send you the right one.

The question is, what is the right one? The key is the type of wheel; is yours convex, or concave? I can't tell from your picture. If it's convex, I recommend our 23-285. If it's concave, I recommend our 23-028.
Mirror Door Roller, Convex
Mirror Door Roller, Convex
23-285
$10.71
Mirror Door Roller, Concave
Mirror Door Roller, Concave
23-028
$10.25
Mirror Wardrobe Door Roller, Concave
Mirror Wardrobe Door Roller, Concave
23-064
$10.97
Sliding closet mirror door rollers and tracks
Sliding closet mirror door rollers and tracks
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