Bottom Replacement Part

A home owner from Pennsylvania says:
So, I'm sure that the part I need is the bottom left, one of the old parts that connects the bottom of my shower door. (check image) However I have 2 questions.
1. Does this kit include the old parts, more specifically the one I need? I'm assuming not which is why I have another question.
2. If it doesn't, does one of the newer parts replace it? Does the "bottom roller" replace that part?
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Casey from SWISCO responded:

Hi there- thanks for posting! 

The manufacturer actually doesn't make this exact style anymore, but we've been told by many other customers that this works as a fine replacement. Take a look at the guide on how to install this here to you shower to see if it will work for you. 

10-058 : Shower Door Roller and Bumper Kit
Shower Door Roller and Bumper Kit
10-058
$33.43
VIEW >
SWISCO 10-058 Shower Door Roller and Bumper Kit
SWISCO 10-058 Shower Door Roller and Bumper Kit
VIDEO
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How to install the 10-058 shower door rollers
How to install the 10-058 shower door rollers
GUIDE
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