Help Identifying Wheel Roller Assembly

A contractor from Philadelphia says:
Good morning- we have replaced the wheel rollers on dozens of sliders in a high rise building here in Philadelphia using your replacement parts. We arrived on site this morning to find that this unit uses different wheel rollers than all the other units in the building. Can you please see if there is anything you have in stock that resembles the part in the attached photos. Thank you.
User submitted a photo of a patio door roller.
Profile picture of Tom
Tom from SWISCO responded:
Sure, I think our 81-051 looks like a close match. Go over the rest of the dimensions we show for it to confirm if it will fit in your door.
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