Acorn Series 800 8' sliding glass door rollers

A home owner from Staten Island, NY says:
I have an 8' sliding glass door, series 800 that is hard to open and close. The door is about 30+ years old in good shape except for the rollers that need replacement. The tag on the door is TQANSI/AAMA4029 as well the following words which look like the following words: stipulates consformate. Do you have the rollers for this door and who do I get to change them in this location?
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Tom from SWISCO responded:
Hello! The Acorn Series 800 door has been known to use our 81-027 roller, but the only way to be 100% sure that this is what you need is to remove yours and compare it to our pictures and measurements.
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