need replacement rollers for sliding glass door

A home owner from Woodbridge CA says:
Need two replacement rollers for sliding glass door. Brand = Viking , model = Sun Valley 300 SDG-R15
Thumbnail of the uploaded file named Roller.jpg
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Lauren from SWISCO responded:

Hello, thank you for posting,

Please start by reviewing the style and dimensions of the 81-077 roller assembly to see how it compares to your original. Let us know what you think and if you have any additional questions! 

Alternate image for 81-077
Alternate image for 81-077

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