Replacement O-Ring.
This O-Ring is to suit Aeroflow Performance Pro Filter with 1.25" x 3.5" body ONLY.
Will suit the following Aeroflow Pro Filters:
AF66-2042-10 / AF66-2042BLK-10 / AF66-2042S-10
AF66-2042-40 / AF66-2042BLK-40 / AF66-2042S-40
AF66-2042 / AF66-2042BLK/ AF66-2042S