Convertible ones are curved to fit around the cockatial shakers and have horizontal stiffener beads rolled into them, unlike the X shaped beads on the coupe versions. Coupe ones won't fit a convertible with the cocktail shakers installed. Convertible ones are rarer than hens teeth. I have one convertible one in my garage (for my car) and have been looking for a second for about 5 years with no luck. I haven't seen any lately on Ebay and the last set I did see went for huge dollars.