Partially dipped clip for attaching the seal on top of the radiator core supports. Often times with air conditioning the seals were installed. The factory sometimes used staples, sometimes clips. You would have to investigate your core support for staple holes. 5 clips are typical for attaching the seal. Spread them apart to where it looks equal.
Applications: 1967 - 1969 Cougars and Mustangs equipped with the 390 engine, and 1970 Cougars and Mustangs with the 428CJ engine.