Sliding glass door

A quick learner from Boston says:
Can't seem to find the attached. Need 4 if possible.
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Tom from SWISCO responded:

Thank you for reaching out to us. I do recognize this roller, but I'm sorry to say that it's been discontinued and is no longer made. 

After looking into it, I have learned that the manufacturer recommends using the 81-256 as a replacement. I can't guarantee it will work, but based on the information I've been given I think it's at least worth considering. Look it over and see what you think.

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