30 Leads per tube. HB Harness for general use. Fits all 0.9 mm automatic pencils. The No. 1-Selling lead in the USA. 0.9 mm Thick line is ideal for students and first-time automatic pencil users. HB Hardness lead is equivalent to a No. 2 wooden pencil. Produces a smooth, crisp line with dark imprint for easy reading. Each 60 mm lead piece writes as far as an entire wooden pencil - One tube of lead is equivalent to thirty pencils! Made in Japan.