This strip clips onto the outer chrome strip, this protects the door from water entering in and rusting the bottom of the door out.These are not sided (will do both Left & Right) Please note that these only fit theAustralian windup window cars with quarter windows. These suit both Morris & Leyland models. These use about x5 of the34G939 clips to hold them on the outer chrome. Tech note: These will be need to trimmed to size to fit; when trimming to size we always make sure you have a clip on each end of the rubber. We generally will cut in between the middle of the dual clip end.