Is this pen compatible with standard G2 refills when the original cartridge runs out

000 meters - roughly double the distance of its closest competitor

Cover: Flexible heavy-duty black cardboard softcover — visible spine stitching

which means watercolor washes or alcohol-based markers can be layered directly over inked linework afterward without the black bleeding

and especially on canvas

pentel energel pure bl77tle rollerball pen 0 7 mm Os Gemeos Is this pen compatible withClean, smooth, and always ready the Pentel EnerGel PURE is one of those pens that just works. The transparent body lets you see your ink levels, so no surprise dry outs mid sketch or during notes. And if it does run out, you can just drop in any EnerGel refill and keep going. The ink flows super smooth and dries fast, which is ideal whether you're jotting notes, sketching quick ideas, or doing fine lines in your blackbook. Its got a soft rubber grip