SWISCO - The Replacement Hardware Authority

Can you tell me the part number

A home owner from Kansas City, MO says:
Measures the same as the 81-018 but has flat rollers and not concave. Thanks
User submitted photos of a patio door roller.
Profile picture of Paul
Paul from SWISCO responded:
This looks like our 81-151 flat wheel patio door roller assembly. Check it out and let me know what you think.
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