8ft wood sliding glass door

A home owner from Ames, Iowa 50010 says:
December 6, 2020
How do I tell if I have a Anderson door. There is a hole on the bottom on each side. Per your web site the 81-128 looks like the correct rollers. Please let me know if this is correct,
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Casey from SWISCO responded:
December 9, 2020

Hello, thank you for writing in. I'm afraid I can't determine what roller you might need without seeing a picture of it removed from the door. Take a look at the video below for more detail on our identification process. 
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