Description Made out of denim in a Micarta material, the Magna Carta Denima features rhodium trim and a steel #6 sized nib and ebonite feed. This pen is a cartridge converter filling pen with a converter included. Nibs available in Fine, Medium, or Broad. Cap Diameter is 18.00mm, Barrel Diameter is 16.00mm, Section gripping diameter is 11.10mm and over all length is 150.00mm.