Pentel 0.5mm HB Mechanical Pencil Lead (144 Pack) C505-HB Pentel refill leads are stronger, longer lasting and darker than ordinary leads, with a slow wear rate that helps prolong the life of your mechanical pencil. The super hi-polymer HB leads are great for general writing, sketching and drawing. This pack contains 12 tubes of 12 x 0.5mm refill leads (144 in total). 0.5mm super hi-polymer refill leads for mechanical pencils Extra strong, slow wear rate, dark colour Great for drawing and shading Grade: HB Pack contains 12 tubes with 12 refill leads per tube Pack of 144