The features of product: Special water-based pigment ink;Non- toxic;water-proof;sun-proof ensuring smooth writing and vivid color Fit for drawing;sketching;signature;cartooning;recording;financial affairs and so on Item includes A pack of 10 pcs pen, each model a pen. Specifications: Marker : 10 pcs/set. Marker size:003.005. 01. 02. 03. 05. 08.1MM. 2MM. 3MM Body Material: Plastic safe and healty for human body and environment. Weight: 9.5g/pcs. Function: Non Toxic, Pigment Ink, Waterprooof, Superior archival quality long lasting vibrant pigment inks that don't smear, fade, bleed or skip. Exceptional professional technical writing and drawing pens for artists, writers, illustrators, students and teachers that provide consistent free-flowing ink with a smooth glide that allows you to create perfect clean lines with every use.