23-011 vs 23-012

A quick learner from KINGSPORT, TN says:
I think 23-011 is exactly what just wore out on my wife's closet door but 23-012 looks very similar. What is difference between "front" vs "back" in descriptions? Thanks.
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Paul from SWISCO responded:
The difference lies in the offset. You will need to measure your roller's offset to determine which is the better match.
A quick learner from KINGSPORT, TN says:
Wow, I am blind. It says 1/2 inch right on description of back version. Mine is 1/4 inch offset so I will order 23-011. Thanks!
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Paul from SWISCO responded:
No problem at all! Thank you for the order, and please let us know if you need anything else.
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