The distinction matters practically — where the K-60 sits on the surface with opaque coverage

Refills can be bought for the regular colors: Pilot BLS-G2-5 Gel Ink 0

Each refill bottle has a precision nozzle for clean marker refills

or even filling larger areas evenly

The exchangeable 60mm Broad-Tip ensures a constant ink flow and is the biggest in the series

pentel graphgear 500 mechanical pencil 0 3 mm Sketch The distinction matters practically —The GraphGear 500's defining feature is its low center of gravity a heavy, diamond knurled steel grip section pairs with a lightweight hexagonal upper barrel, pulling the pencil's weight down toward your fingertips. This gives exceptional control and reduces hand fatigue during long sessions, which matters even more at 0. 3 mm, since ultra fine leads are the most prone to wobble and snap under uneven pressure. The fixed 4 mm stainless steel guide pipe