It is maximal in color and shape

Jaime Rojo

which keeps lead from advancing accidentally while it's loose in a bag or pencil case

Once it’s been hit by UV light — sunlight or even artificial light — the ink slowly shifts into a deep dark brown

5 mm uses the same ergonomic barrel with a thinner lead

kaco pure biodegradable soft touch gel pen 0 5 mm 4 set black NOS It is maximal in colorEnvironmentally friendly pens where the pen itself is made of 100% biodegradable material. Of course, you can also purchase refills for the pens. We love sketching and drawing with these pens; the tip is 0. 5 mm wide, and the black ink glides smoothly on paper and dries quickly. In this pack, you get four pens, all filled with black ink. See our full range of KACO products here.