A little help on identifying a patio door roller

A home owner from Arvada, Colorado, USA says:
I have a pair of rollers that are identical to the 81-138 roller in all regards with the exception of the roller diameter. Mine are 1 1/4 inch diameter. The metal casing is stamped DelMar Manufacturing Canada.

Do you have a roller that is identical to the 81-138 with 1 1/4 inch rollers?
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Bob from SWISCO responded:

We only carry the 81-138 with 1-1/8" diameter rollers, but you should be able to adjust the rollers to make up this difference. Let me know if you have further questions. 

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