1987 - 1991 Chevrolet Blazer Hard Top Weatherstrip Seal Kit, 4 Piece Set. This kit seals the hardtop against the top of the windshield frame and the sides of the body. This is a 4 piece kit which includes the two front header weatherstrips and the left and right side rail weatherstrips. It's made from high quality ozone resistant EPDM rubber from the original specs.