so they handle pressure without breaking

and most parts are refillable

The ink is water resistant

Crayons with artist quality with high opacity and light resistant

Perfect for watercoloring

grog xtra flow paint refill 100ml Colors:Goldrake Purple so they handle pressure withoutGrog Xtra Flow Paint Refill, 100ml is the stuff that keeps your markers flowing smooth and steady. Packed in a tough plastic bottle, its made to refill all your Grog Green Label markers. With 100 ml of glossy, opaque, alcohol based paint, it glides like butterno streaks, no drama. Perfect for the Cutter markers, and ready for indoor or outdoor sessions, its the refill that keeps your colors bold and your lines sharp.