These 2 moldings fit at the sides of the rear window on the interior of 1966 and 1967 Buick Rivieras.   These CHROME trim pieces were only installed on the custom / deluxe upgraded interiors.  (Standard Rivieras got painted moldings that matched the interior color).  Note that for 1968 and 1969 these were no longer chrome finish on the deluxe interiors... all Rivieras got the plain painted interior trim pieces.  There's a separate listing for the upper pieces if you need them ...or contact me if you only need one piece of trim and I can list individual.