A flowpen filled with black permanent ink that has bitumen mixed into it

designed to slip into your pocket unnoticed

230 Yellow Green

so color stays true rather than yellowing or fading over years of storage

covering everything from microscopic detail work to broad lettering strokes within one product line

moleskine classic x large notebook soft cover squared Cherokee A flowpen filled with blackA large format 5 x 5 mm graph grid softcover notebook for software developers, data scientists, and engineers who need expansive geometric structure for coding sequences, algorithms, and statistical plots in a flexible carry format. The faint grid lines guide pen work without crowding finished diagrams. Flexible matte black leather grained cover, thread bound flat lay construction, 192 ivory pages, 70 g m acid free paper. Format: XL (19 x 25 cm) 192