WOCD for double hung Marvin window

A home owner from Sudbury, Ma says:
CAn you please ad use which of your products would best fit a Marvin double hung window which is I already installed

Thank you
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Bob from SWISCO responded:

Thanks for posting. I'm afraid this hardware is very brand-independent, so I can't say for sure what you need based off manufacturer identity alone. That said, take a look at our 26-387 and 26-434. Look over both kits and let me know if you think one of these is what you need. 

26-387 : Face Mount Single Action Vent Latch Kit
Face Mount Single Action Vent Latch Kit
26-387
$16.18
VIEW >
26-434 : Double-Hung Window Opening Control Device Kit
Double-Hung Window Opening Control Device Kit
26-434
$48.45
VIEW >
How to install a Window Opening Control Device (WOCD) kit
How to install a Window Opening Control Device (WOCD) kit
VIDEO
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