The Rolling Thunder Writers (RTW)

that will keep your paintings looking beautiful for up to 200 years

suited to detailed portrait work

Exchange tips for Grog’s 20 mm Squeezers

and everything in between

pilot acroball ballpoint refill brfv 10f medium 1 0 mm DEFS The Rolling Thunder Writers (RTW)A 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.