Anderson Sliding Patio Glass Door

A home owner from Warren. NJ says:
We have Anderson Patio Glass sliding door installed in 1986.
Recently. it does not slide smoothly.
We probably need to change the rollers.
We think there are two rollers (2 wheels each).

Please help me to identify the part so I can order two of them.

Thanks,
Robin
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Tom from SWISCO responded:
To provide you with the best recommendations possible, we would need to see a photo of the part in question as well as some measurements if you are able to. This will help us review the part further in making suggestions.
A quick learner from patio dliding door says:
The measurement of my Anderson sliding patio door is 72 inches.
The photo is attached.
Mike, please let me know how many wheels we will need to replace, the door is not locking.Do you have them in stock.
glass door
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Paul from SWISCO responded:
Back in the 80s, Andersen was changing their rollers from the 81-018 to the 81-128. There is no way to know for sure which it is you need. You will need to remove door and check which roller is a closer match.
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