what size grommit blank do u need for a 6n??

not sure exact, when i did mine i took my wiper out and took the rubber that sits around it to the local motorist discount shop and just asked for a blanking grommet the same diametre, think it was around 40p or something

24mm I think, not 100% sure mate, just measure it when you take it off, that's the easiest thing to do.

ok thanks for the help :)

8mm rubber bung from halfords, bit of a squeeze but then you know it's water tight!