Product review (5 stars): I have an old Frigidare stackable
This part worked perfectly so it does indeed replace part # 131963900.

I don't know why the Teflon Drum Glide melted to the drum liner however, we carefully slit the fabric (wool) from the melted telflon.

This part snapped in place and fit every slot PERFECTLY.

The only challenge is getting this dryer apart. It is not trivial. After you get the top off the side clamps have to be broken to get out (and put back in, don't bother). Take out every screw that you can see. Disconnect the wires. Then between the front (door and all) and the bottom panel (about 8" high) there are plastic pegs connecting them, just insert a screw driver about 6" from each side and pry downward (they pop out readily). The front now comes off and can be removed from the drum (if they are not melted together; I think this is unusual). If you just need to change the drum belt (we had to do this too) I think you need to take the bottom panel off. There are two screws that hold it to the bottom. Change the belt or insert these Drum Glides and reassemble.

Our dryer is back working perfectly.

Good luck!