Roller replacement

A home owner from Brooklyn 5 story condo says:
There are two on the bottom of the door and two on the top. I need to replace the rusted ones on the bottom
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Emily from SWISCO responded:

Thanks for reaching out to us! The roller shown here reminds me of the 84-074 and 84-074B. Take a look at the specifications and see how they compare with your old assembly. 

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