This seal mounts on the upper part of the door with the taller part facing the cab which then will make contact. This is a pair for the left and right side. It's made from high quality ozone resistant EPDM rubber.
1973-1977 chevy & gmc pickup c/k series
1975-1977 suburban & crew cab (trim for rear doors)
1975-1977 blazer & jimmy (full size)