Visconti Van Gogh Nib Unit F Stainless Steel Nib Copper Color This is likely a replacement nib unit specifically for the Van Gogh. It's a somewhat rare copper color. The nib width is F. I say "specifically" because it wouldn't fit my BREEZ, which I own. I have three Van Gogh pens, and it fit in all of them. I don't have a Mirage, so I can't say if it fits. I haven't used it in a while, and I don't plan to use it in the future, so I'm putting it up for sale.