The 1978-1988 GM cars like the Chevrolet Monte Carlo, Buick Regal, Oldsmobile Cutlass and Pontiac Grand Prix had the option of T-tops, the T-tops are nice but the sun and rain can take their toll on the seals and they will soon start to leak rain and wind. This kit includes the seals that attach to the car as well as the seals for the removable panels, nothing else to buy to seal up your car better than new. Sold as a set.