It’s taken a lot of work behind the scenes to bring my idea of a brush tip that's compatible with a fountain pen to life. Turns out there was a reason why noone had really done it before! I’m so pleased that I finally cracked it, as it is such a joy to use. The versatile tip adds real depth to line work so it’s perfect for brush lettering and illustration, and it can be refilled time and time again with a whole range of inks for maximum creative expression. The Japanese Brush Tip is 4.5mm at its thickest and hairline at its thinnest giving loads of depth and expression to your artistic stroke. I designed a brand new feed using an SLS super accurate industrial 3D printer to ensure that the air flow was good enough to transport the ink smoothly and generously from the cartridge through such a chunky tip.