Old sliding door roller

A quick learner from Bloomingdale, ga says:
Looking for these rollers. Looks kinda like bearings. 1 1/2" tall 3 1/2" long 3/4" wide.
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Casey from SWISCO responded:

Hello,

You have an old discontinued roller that is not made anymore. With that being said, we've been told that the 81-279 works well as a replacement. The adjustment screw is a little higher but the wheel functions better than the noisy old tank treads style. Take a look and see what you think. 

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