Revolutionary Nib: The Air' s pressure-sensitive nib provides a writing experience similar to a fountain pen.
Smoother Flow: The metal ball is encased in a plastic nib for a smoother flow of ink.
Fine Line: The 0.5 mm ball delivers a line width of 0.28 - 0.45 mm depending on pressure.
Tamper-Resistant Ink: The ink is water and light resistant and cannot be washed off with chemicals.
Pack of 12: Contains 12 black rollerball pens.