Sketch pencils have 2H ~ 8B refills with softer hardness
H is the abbreviation of Hardness, which means "hard";
B is the abbreviation of Black, which means "black";
HB is intermediate and suitable for writing, while B pencil is suitable for drawing.
Such as 2B, 4B, 5B, 6B, 7B, 8B. The larger the number, the darker and softer the written word.
Kaweco mainly provides 3.2mm and 5.6mm sketch pencils