The file 'Cat Door Edge Guard 3D Printer Model' is (stl) file type, size is 218.5KB.
My cat can sometimes struggle to open a door so I printed this to fit onto the bottom to give them some grip with their claws and protect the door.
It is made to be nearly as thin as possible but I could check the clearance on the door first
If you want to print extensions just cut off the bottom piece in the slicer
Cat_Door_Guard.stl | 645.0KB |