Sold as 1 Dozen. China markers are capable of drawing on almost any porous or nonporous surfaces. Ideal for marking on glass, plastic, film, paper, metal, and rubber. Pack contains red markers. Marks wipe away clean from porous surfaces. Safety Data Sheet. Featuring a bold tip, which helps to make beautiful bold strokes. These markers are paper wrapped with a tear string making them easy to peel, needs no sharpening. Comes in a pack of dozen markers. Certifications and standards: Meets or exceeds PMA certifications.