Plastic piece are cracked and is brittle.

A quick learner from Troy, MI 48084 says:
My ducanna windows were installed in 2003, this plastic piece has cracked and is brittle, the slider bar drops out of my window, I need 6 total, no idea what this part is called...Pamela
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Lauren from SWISCO responded:

Hi Pamela, thank you for posting,

It appears that you are in need of a new tie bar guide. We carry two styles, the 39-448 and 39-417. Please review the overall style and dimensions to confirm the best fit! Let us know if you have any additional questions. 

SWISCO 39-417 Tie Bar Guide
SWISCO 39-417 Tie Bar Guide
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Anatomy of a casement window
Anatomy of a casement window
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Replacing tie bar guides
Replacing tie bar guides
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