Thread: Td5 auto oil cooler lines - O ring size?

Hi folks.
Having inspected the cooler lines on my D2, one of which decided to unscrew itself, I can't see O rings on either of the fittings at the gearbox end
Anyone have a size for these? Are the a true O ring or are they a flat rubber seal? Kind of difficult to see the top one...

No idea about size, but they are a normal O ring.

This is the part, ignore the description they are used on various oil lines on various models, ESR1594L | O RING OIL COOLER - DISCOVERY 1 + 2 - RANGE ROVER CLASSIC - FREELANDER 1 | Land Rover | Discovery 1 - 1989 to 1999 | Britcar (UK) Ltd