HB hardness same as No. 2 pencil. 1 tube with 30 refill leads. 0.7 x 60 mm. Break resistant. World's No. 1 selling lead. Superior quality. Fits all 0.7 mm mechanical pencils. Consistently smooth writing, resists breaking, and produces a clear, dark line. HB hardness is equivalent to a No. 2 wooden pencil. Guaranteed to scan on all tests and documents. Writing starts with us. A Recycology product (Recycology product are a minimum of 50% recycled material by weight excluding consumable content and refills). A Recycology eco-friendly product. Recycology the Science of reduce, reuse, recycle. Please recycle packaging. Limited Lifetime Warranty (Valid in USA Only): Each Pentel product is warranted for life against failure due to defects in materials and workmanship. For warranty service, return product for free repair or replacement to: Pentel of America Ltd 4000 E Airport Dr Ste C Ontario, CA 91761 USA. Attn: Quality Assurance Department. Visit us at www.pentel.com. Assembled in Mexico. Made in Japan.