The rear side windows (quarter windows) on The 1966-1967 GM 'A' body (except Chevelle & Malibu) 2 door hardtops and convertible cars have a seal on the front edge of the rear side windows (also called quarter windows) that meets up with the door windows when you close the doors. This is the pair of chrome retainers that the seals fit into for the left (drivers) and right (passengers) side. The seals are available separately.
This pair of chrome seal retainers fit the following cars: 1966-1967 Buick GS, GS 400, Skylark & Special, Oldsmobile Cutlass & 442 and the Pontiac Tempest, LeMans & GTO 2 door hardtop or convertible.