Graphite Pencil, Thickness: 0.7 mm, Colour: Black
From Amazon
rOtring Rapid Pro Mechanical Pencil | HB 0.7 mm Lead Propelling Pencil | Reduced Lead Breakage | Matte Black Full-Metal Barrel
The Range
Rotring Rapid Pro Mechanical Matte Black or Metallic Silver HB Pencil or Pen - Black / Mechanical Pencil, 0.7 mm