This is a Pair Left Hand and Right Hand Original GM Window Channels for Front Door Rear Roller on the lower glass sash. These fit 1968 Chevelle, Chevelle SS, and Malibu, GTO, LeMans, Cutlass, and Convertibles. These are near the back of the doors for roller that is on the front door glass on the lower sash. In Excellent Condition, This is a File Photo, See Pictures.