Shower Door Guides bottom of doors - plastic

A home owner from Eureka, MO says:
Need to replace all shower door guides on the bottom of the doors due to age and calcium build up. Doors will not slide.
Thumbnail of the uploaded file named IMG_35101.jpg
Thumbnail of the uploaded file named IMG_35101.jpg
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Tom from SWISCO responded:

Hello! This looks like our 10-216 shower door guide to me. Look it over and let me know what you think.

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