The highly economical Uni Pin drawing pen features waterproof and fadeproof pigment ink. Ideal for all types of art and design, including sketching and technical drawing, the steel-supported polyacetal nib is available in a range of line widths. This set contains five pens. Four with brush nibs, one in each of black, light grey, dark grey and sepia. The fifth pen is black with a 05 nib. Metal surround protects the nib and makes these pens suitable for use with stencils. All colours are part of Uni's Super Ink range - fade-resistant, water-resistant and tamper-proof.