Window operator

Thanks for posting. This operator's arm design looks like the 39-171 to me. However, the link arm on this operator is also 5", while yours indeed looks shorter. You have a few options. First, you could try re-positioning the stud bracket on the casement window to make up the difference. Second, you could swap out the new link arm with the old one using a rivet like the 62-014B. let me know if you have any questions about this process.