1981 - 1991 GMC K3500 Beltline Molding Kit. Rubber Covered Stainless Steel Core With A Felt Lining. 4 Piece Set, Left and Right Hand. These beltlines mount with the pre-applied clips on the left & right rear doors to sweep the inside & outside of the glass. ???Our product is made from the original specs and from high quality ozone resistant materials to fit your vehicle.