The polymer Acme Studio Pencil Leads, suitable for use in any Acme mechanical pencils.
Acme Studio Pencil Leads
Also they fit in any other mechanical pencil that uses a 0.7mm lead. They have 60mm length. A grading scale, ranks the pencil leads hardness in HB or B grades; While H stands for the lead’s hardness, B denotes it’s blackness. Consequently, B grades the pencil lead as softer that the HB lead. they come in Pack of 12 leads.