Dyad part #30615 or 30814

Hello!

These numbers have been associated with the 39-089 and 39-090 in the past but this is by no means a guarantee. You'll have to carefully compare the specifications with your old assembly to see if they match up. I'm also happy to take a look at your old operator if you can show me a photo of it with the window open so that I can see a clear shot of the arms. 

Note, we also sell the 39-187 and 39-188 which have a different zig-zag shape. Let me know if you have any questions!