This item has been Discontinued and limited to existing inventory, may have minor blemishes.
Interlock for an Andersen Perma-Shield gliding door built from 1966-1978. This will fit a two or three panel door. It is white in color. On the 2 panel door, it goes on the operating panel. On the the three panel door, it goes on the side of the operating panel that does not have the lock. This is one of two pieces for this location. The interlock weatherstrip is #1917106. 

For more information, please read article: Identify Your Andersen Weatherstrip 
or download a Worksheet in PDF format to help you decipher which door you have.