I have a couple of sliding patio doors that were installed late 80s early 90s. I am looking for this square, weatherstripping that slides into a groove on the jam and on the stationary door. This looks to have a wall inner seal with a vinyl or exterior seal. I am assuming it was screwed on after it started to detach from the grooves in the jam and door. I do not know the door have not been able to identify.
Will also need other weatherstripping at the threshold, but will start with this first and hopefully get an idea of what the door is.