1-3/8 diameter, 7/16 bore. With ferrules and caps. Will fit all makes.
"So that 'I, Robot' - is that something to do with Apple then?"
It's a pretty great film though.In my favourite room in the National Portrait Gallery (the Kit-Cat club) a teacher rushed through with his kids saying 'Don't worry about these guys, they're not important'.What's education coming to when pupils don't even learn the etymology of chocolate bar names?