O-Ring Boss (ORB) AN on one end, and Male AN on the opposite end.
Adapters come black anodized. O-Ring is safe for all fuels, oil, coolant etc.
**Images are not representative of each size difference.
***MANUFACTURER MAY CHANGE DEPENDING ON SIZE CHOSEN. WE ONLY PARTNER WITH QUALITY MANUFACTURERS, THESE ARE NOT CHEAP EBAY FITTINGS!!!***