You can't afford to run out of 0.5mm leads, so save time and money by ordering your pencil leads in bulk from On Time Supplies. On Time Supplies offers quality pencil leads for bulk purchase. Thanks to bulk pricing from On Time Supplies, your mechanical pencils are always ready to use. If you need more information on the supplies featured at On Time Supplies, or on GSA pricing, call us toll free at 1-866-501-6055. We're happy to answer any supply questions.