Spacer added to top of assembly?

A quick learner from Burien Washington says:
March 27, 2017
Our old roller assemblies from a Millard Sliding door need replacing and Luik very similar to your 81-149 rille assemblies, however, we have spacers that slide into a channel...it looks like your assembly may have a slit/spacer track to slide our spacer into?? Please confirm.

Thank you!
Kellie
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Tom from SWISCO responded:
March 29, 2017
Yep, the 81-149 has a slit on top to let you slide the old spacer in. You should be able to reuse your old one.
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