- Q-Connect KF13321 permanent markers, pack of 10 units in black color - Fine 0.6 mm tip for precise and detailed writing on CD, DVD, Blu-ray, and multiple smooth surfaces - Alcohol-based ink, water-resistant, quick-drying, and does not smudge - Non-toxic, free of xylene and toluene, safe for prolonged use - Writes on glass, plastic, metal, porcelain, sheets, paper, and cardboard - High color intensity and clear outlines for professional labeling - Vented cap with clip, resistant to drying out for up to 14 days without a cap - Ideal for office, school, digital file organization, and universal labeling