Sakura Pigma Micron Pen is one of the most popular pens among artists, writers, illustrates as it is the ideal pen for making detailed drawings and craft work. Sakura Pigma Micron Pen is 135mm long, which is able to fit almost all pencil cases. The nib of Sakura Pigma Micron Pen is made of nylon and metal. The needle shaped nylon nib gives the ability to keep the width of stroke no matter which direction the nib is going. The metal structure stabilize the nib to guarantee the performance of the pen. There are 7 different sizes available with Sakura Pigma micron Pens. 005-0.20mm 01-0.25mm 02-0.3mm 03-0.35mm 04-0.4mm 05-0.45mm 08-0.5mm With the various sizes, sakura Pigma micron Pens are able to satisfy all your requirement for detailed painting. The specific ink is highly resist to water, liquid and light. The is able to avoid the situation that a drop of water ruins the whole draft. The ink is also pigment-based, which give a pure black colour. The AP label indicates that there is no acute or chronic harm with the pen. The label at The tip of the cap makes it easier to pick the right size during work. The design of the cap shows the spirit of Made in Japan, "every detail is taken care of".