As you can see from the pic, one of the arms has sheered. Overall length of extended arms, just over 14". Don't know what window type contractor put in during remodel.
Casey from SWISCO responded:
December 21, 2021
Hello,
Take a look and compare the specifications of the 39-239B operator, as well as the related items on the product page, to your hardware. Thanks for posting!
A home owner from Kailua, Hawaii says:
December 21, 2021
Casey, Thanks for the help. I was looking at a different part, the one you suggested looks much more like the original. I just ordered it. Happy Holidays.