The pieces are too "fat", or thick. They do not give enough clearance for the metal channel at the bottom of the glass to pass through, and let the window roll all the way to the top. I still have my originals, and have compared them side by side. They repro's are not well formed, (too thick) and have junky little clips that fall off at the slightest bit of tension, and are not reusable..........in other words POS!