Get creative with these Pitt artist brush pens from Faber-Castell. In a handy pack of six, these pens feature waterproof drawing ink with high-quality pigments for unsurpassed light fastness & finest top quality, archival Indian ink. They provide a reliable, even flow of ink & the point glides softly & smoothly over paper. These pens are perfect for drawings, plans, layout work & are acid free.