Tombow Mono J Professional Highest Quality Drawing Drafting Pencils Dozen BOX (Pack of 12)-4b The Tombow Mono J line is a great, light weight and high quality pencil for drafters. Users love the pencil because it features a break resistant, high-density graphite lead core that will produce crisp drawing lines again and again. Pack of 12 Pencils Pencil Lead Hardness-4B Made in Japan