Oil cooler line nut size?

[m1tch]

Hi all,

Just in the process of upgrading my looped oil cooler, I have just pulled out the original as it had been disconnected and looked in a bit of a sorry state.

The oil lines have been looped with which I believe is one of the hard lines meant to connect to the oil cooler.

I have been mocking up the uprated oil cooler which is a large 19 row cooler which will sit on the nearside of the radiator at the front (the useless aux fans have been removed) - it seems that the spanner I need to remove undo the oil lines is a 28mm - can anyone confirm this as I need to go out and get one specifically for it.

Thanks in advance!