What is the lower Andersen screen door roller?

A quick learner says:
The item that you show as the 84-078 upper screen door roller for the Andersen screen door appears to be exactly the item we are looking for - to replace the lower screen door roller for our Anderson sliding screen door. The lower screen door roller displayed on your site looks nothing like the item we need to replace. Obviously, I'm confused. Also, do you have instructions for how to remove the old roller unit and insert the new roller unit? It does not appear to easily come out and I'm afraid of damaging the door.
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Paul Sr. from SWISCO responded:
Usually the lower wheel assembly for an Andersen screen door is the 84-070.

If your lower wheel assembly is not the 84-070, here is the available Andersen screen door replacement hardware. If you cannot find your lower screen door roller on that page take a look at the replacement screen door roller category section. If you still cannot find your roller feel free to email us a picture of the roller you are searching for so that SWISCO can research it for you.

Click here to view instructions on how to remove the old Andersen upper wheel assembly from the screen door.
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