Sliding Door Roller - Del Mar Engineering

A contractor from santa rosa, CA says:
April 15, 2014
Hi
I'm trying to replace the door roller - see photo enclosed. It is a Del Mar part and is stamped patent pending. I've been on your site and seen the two items 81-255, 81-254 and they seem to be slightly different in size - see dimensions on enc photo
Could you help suggesting a replacement part?
thank you
User submitted a photo of a patio door roller.
Profile picture of Paul
Paul from SWISCO responded:
April 16, 2014
This looks closer to our 81-139. Check it out and see if you agree.
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