Andersen roller help

A quick learner from New Jersey says:
I am looking for a replacement for my 6"Anderson sliding door. Talked with Steve and he recommended I send you some photos to help identify the roller. Door was installed around 1976. In the lower right hand corner etched in the glass was Guardian Safety SGcc406.
Since it is a heavy door that I will need help removing, I would like to remove and replace at the same time.
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Tom from SWISCO responded:
Thanks for posting. I'm afraid we cannot identify what rollers you have based on your pictures. I recommend looking through our selection of Andersen double wheel roller assemblies. The only way to be 100% sure which would work is to remove yours from the door.
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