Reproduction rear window weatherstrip seal for the large back window equipped 1973-86 C/K-Series and 1987-91 R/V-Series Chevrolet and GMC Pickup models. Manufactured from ozone resistant EPDM rubber in the same OE specs as the factory original seal for an authentic fit and finish. Installs using the rope-in method.Note:This weatherstrip is designed for pickup models with the larger 62-3/4 x 14-1/2 window opening. It is designed to be installed without the trim as it dooes not have the additional groove needed for trim installation.{specs}Chevrolet Applications:1973-1986 Chevrolet Pickup Truck (C/K Series)1987-1991 Chevrolet Pickup Truck (R/V Series)GMC Applications:1973-1986 GMC Pickup Truck (C/K Series)1987-1991 GMC Pickup Truck (R/V Series)