truth hardware dual arm casement operator

A quick learner from CDA, ID says:
September 1, 2020
The number stamped on the operator is #R30842 and L30841. i need 2 lefts and 1 right.
Thanks
Doug
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Bob from SWISCO responded:
September 4, 2020

Hey Doug. I can't be certain, but start by reviewing our 39-031 & 39-032, or our 39-155 & 39-156. The only difference between these two operators is the length of the link arm, so compare both with your old hardware to see what matches up. If neither set seems right, please show us pictures of your operator assembly. 
EntryGard Dual Arm Operator
EntryGard Dual Arm Operator
39-031
$29.70
EntryGard Dual Arm Operator
EntryGard Dual Arm Operator
39-032
$29.70
Caradco Window Crank, 9-1/2"
Caradco Window Crank, 9-1/2"
39-155
$29.85
Caradco Window Crank, 9-1/2"
Caradco Window Crank, 9-1/2"
39-156
$29.85
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