The new, durable Plastic Nib (PN) provides skip-free writing in 8 colours. The plastic nib allows a fine (0.4mm) or medium (0.5mm) width to be achieved with an adjustment of writing pressure. The polyacetal nib structure provides consistent, smooth ink flow, whether writing fast or slow and the Pigma archival quality ink is waterproof, chemical and fade resistant, bleed free, quick drying and pH neutral.