rollers are 1 1/8 in diameter housing 3 1/8 x 1 1/8

A quick learner from Manchester Jamaica says:
Patio doors tandem rollers required
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Tom from SWISCO responded:

Hello! Your roller looks like a dead ringer for our 81-154. Don't take my word for it, though. I recommend reviewing our specs just to be sure they all line up.

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