Sliding door roller assembly circa 1950's Kilian

A contractor from San Diego says:
Need to replace a pair of rollers on an old sliding door with no markings. Kilian is printed on the nylon wheels. Thanks for your help!
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Emily from SWISCO responded:

Hello!

This looks similar to our 81-254 roller but look over our dimensions and compare them with yours to confirm this matches up. 

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