Please Note: No "1" for Refill B， No "2" for Refill 2B， No "3" for Refill 3B，No "4" for Refill 4B， No "5" for Refill H， No "6" for Refill 2HSpecification:Box Size: Approx.78x20x6mmDegree of hardness: B/2B/3B/4B/H/2H Black Color Leads: 0.5mm(diameter) 60mm(length)Features:1 tube contain 40 pieces.Supplied in convenient swivel-top tubes.The lead has achieved dramatic improvement in strength and smoothness.It is standard lead used in all 0.5MM automatic pencils.Package Included:1x 0.5mm 40 Leads Refill for Mechanical Pencil