Window operator

A quick learner from Cliffside park, nj says:
I'd like to purchase window operator brand name entryguard truth part number 30470 LH(see photo provided) and also for the RH ? as well. I need 3 left hand and 2 right hand. Please let me know the parts number. Thank you.
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Emily from SWISCO responded:

Hello!

It looks like you may have the 39-031 & 39-032 or 39-155 & 39-156 operator, depending on the length of the link arm. Look over the dimensions for each and see which one matches up best. 

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