1968 - 1973 Nissan 510 4 Dr Sedan - Door Weatherstrip Seal Kit, Left and Right Hand, 2 Piece Kit. This seal presses into the channel on the door. Adhesive can be used for a more secure fit. This pair fits the left or right side, front or rear doors. ???They are made purposefully long to cater to each door so you will need to trim off the excess. It's made from high quality ozone resistant EPDM rubber with the same specs as the originals.