I have sliding glass aluminum patio doors. They are about 20 years old.
The plastic inserts that act as a bearing surface are missing or worn.
The part on the left of the photos is what I need, this is for the door.
I ordered the part on the right of the photo from you, these apparently are for the screen.
The new parts do not fit, the screen aluminum is thinner than the door aluminum.
I need about 20 of these plastic pieces.