What is this part of the storm door?

I need to fix this strip on our storm door. I’m not sure what it’s called. It’s made of hard plastic but has warped from years getting baked in sun.

Anyone know what it’s called so I can go get replacement parts?

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I believe it's called a mullion. It is a hard plastic strip that snaps into a groove to lock the window pane to the door frame. They can be purchased but they have to be the exact size and profile which can make it difficult to get. You might be able to work it back into the groove and snap it into place.
- Hi, locksmith here, a mullion is actually the strip of wood or metal that goes between two French doors as a center pillar for the doors to latch to.

13 comments