Blue， Medium Tip Generic Refills for Livescribe Pulse， Echo or Sky Pens. Smooth-writing Premium German Ink.<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"> smooth-writing German ink </span></li><li><span class="a-list-item"> Medium tips (1 mm) </span></li><li><span class="a-list-item"> Blue Ink </span></li><li><span class="a-list-item"> 5/pk， 57mm， fits Pulse， Echo &amp; Sky pens， (does not fit Livescribe 3) </span></li><li><span class="a-list-item"> Money-back guarantee! </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/417LJcJgwSL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41Ic%2B4WD4ML.jpg" noproxy>