HB Pentel Super Hi-Polymer Lead Refills for Mechanical Pencils, Size 0.4mm
Made in Japan
Mechanical pencil refill leads. These leads are very fine and more prone to breakage than larger sizes. They are excellent for rendering fine details. HB is the what comes loaded in our Graphgear 1000 mechanical pencils.
0.4 mechanical pencils are note common in the US. These refills are more expensive because they are specially imported.