The nib is 4 mm wide

This set is the soft

suited to detailed portrait work

Exchange tips for Grog’s 20 mm Squeezers

pilot acroball ballpoint refill brfv 10f medium 1 0 mm DEFS The nib is 4 mmA direct replacement core for Pilot Acroball and Acro pen bodies. Pilot's low viscosity Acro Ink is formulated to release a generous, even flow without pooling, bleeding, or blobbing built for heavy handed writers and signatures where a thin line looks weak. The hybrid ink dries almost instantly on contact, so closing the notebook right after writing won't smear or ghost onto the facing page. Medium 1. 0 mm stainless steel tip, 0. 32 mm line. Tip: 1.