Pentel Super Hi-Polymer Leads are formulated under an exclusive process to improve strength yet retain blackness and smoothness. They require only light pressure to create dark, clean lines. The Super Hi-Polymer formula reduces the risk of lead breakage and as a result, saves lead.
12 lead refills per tube. Lead sizing in .3mm, .5mm, .7mm and .9mm diameters, in degrees from a soft 4B to a hard 4H.