This is for 1 cord operator for Screenline internal blinds (integral blind).

These are often used on Andersen E-Series patio doors that have blinds between the glass. The Andersen part number is KB034.

The overall length is 34".  See the photos to show where this measurement is taken from.

This is a brand new operator that will match the original operator from Andersen.

Installation instructions included.  Or you can visit the video link below to watch how the operator is installed (start at 1:30)

https://www.youtube.com/watch?v=7uogPwNjPHY&t=96s