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Quick Learner from Texas

Feb 27, 2026 4:17 pm

Not sure what this part is called

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2 Replies

Lauren from SWISCO

Mar 3, 2026 12:05 pm

Hello, thank you for posting,

It appears your window uses the 39-253LB and 39-253RB or the 39-438B and 39-439B. The main difference between the two styles is the track guide at the end of the straight arm. Take a look at the video below for more details!

Compare the dimensions and orientation to confirm a good fit!

Also see the 39-451 and 39-452 or the 39-375 and 39-376 handle/covers depending on style preference. Let us know if you have any additional questions!