Uni-Ball Diamond Infused Leads， 0.5 mm， 40 Leads<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Fits most refillable mechanical pencils. </span></li><li><span class="a-list-item"> High performance HB lead refills made with diamond-infused lead. </span></li><li><span class="a-list-item"> Strong， long-lasting material resists breakage. </span></li><li><span class="a-list-item"> Produces consistent vivid， dark lines. </span></li><li><span class="a-list-item"> Won't damage or smear documents. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/411zyz3WH6L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31GvZ-jRrWL.jpg" noproxy>