A precise 5 x 5 mm graph grid hardcover notebook for engineers

and the ink is mixable: touching the nib of this pen briefly against another Parallel pen filled with a different ink color blends the two on contact

structural pencil

letting you blend two colors into a gradient rather than working with a hard line where they meet

pentel colour brush pen Jake A precise 5 x 5The Pentel Colour Brush is a squeeze controlled water based brush pen built for expressive hand lettering, comic layout drafting, and illustrative sketching. The defining feature is the flexible nylon brush tip hand assembled from shape retaining filaments that hold a consistent form under extreme bending pressure, allowing line width to shift from razor thin detail strokes to broad sweeping marks in a single continuous movement without shedding or