simple brake pipe question

[BigVtwin996]

ok... all my tools are else where..... so need to buy one
what size spanner do I need to undo the brake pipes on the master cylinder?

Hopefully once Master cylinder is replaced could be heading for the road...

[brodfather11]

If I remember right there are two sizes of pipe nuts , designed so you cant put the wrong pipes in the wrong places , 10mm and 12 mm ?