A mechanical pencil with Premium Hi-Polymer Leads helps you create dark, easy-to-read lines, so your notes are neat and legible when you review them. The sturdy strength helps minimize the frustration caused by snapped leads when you're trying to scribble down a phone number or other critical information. Patented manufacturing process gives each Pentel Super Hi-Polymer lead refill greater strength, a darker line and minimal breakage. 60 mm length. Pentel Pencils part of a large selection of office supplies. Pentel(R) Premium Hi-Polymer(R) Lead, 0.5 mm, HB, Fine Point, Black is one of many Mechanical Pencil Refills available through Office Depot. Made by Pentel.