Patio door nylon top track guide.

Hello,

Your patio door guide resembles the 80-045. Take a look and compare the specifications below to your part. Thanks for posting!

Alternate image for 80-045

I am not sure if the 80-045 is your original top guide on your door but I can tell you that it is held in place with a screw through the hole at the bottom of the guide. If you are using this on a different door, see if there is a screw at the top of the patio door panel that holds the panel together at the top. If so, see if you could use that screw to mount the guide. Lastly, you might need to drill a hole at the top of the door and use the correct diameter screw to mount the guide. Take note when drilling not to damage the door frame or the glass.