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Handy Person from House
I have no information on these windows and I'm in need of getting 4 replacement cranks 
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Emily
Emily from SWISCO
SWISCO
Expert

Hi there!

Take a look at the 39-253RB and 39-439B operators. The difference between them is the guide at the end of the straight arm as explained in the video below. Review the specifications and see if one of these assemblies matches what you need.

Please let us know if you have any questions! 

Dimensions for 39-253RB
Dimensions for 39-253RB

Dimensions for 39-439B
Dimensions for 39-439B

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