This windshield seal goes first on the glass and is installed using the rope-in method. The trim groove requires you to re-use your 3/8 shallow set chrome trim. Made from ozone resistant EPDM rubber and from the same OE specs as the original for an authentic fit and finish. Will fit Chevrolet GMC, 1971-1972 Blazer, 1971-1972 C-10, C-20, C-30, K-10, K-20 pickup, C-10, C-20, K-10, K-20 Suburban, 1971-1972 GMC C-15, C-25, C-35, K-15, K-25, K-35 pickup, C-15, C-25, K-15, K-25 Suburban, 1971-1972 Jimmy  has groove for trim, with moulded corners, great replacement, New Precision Replacement Parts, Thanks For Looking !!