Product Name: Color hook pens, needle pens, stroke pens, filling pens, graffiti pens. Type: Gel Pen. Ink Type: Water-based liquid ink. Ink Feature: Standard (non-erasable). Writing Point: 0.3mm fine tip. Material: Durable plastic. Origin: Mainland China. Chemical Safety: No high-concern chemicals used. Gift Ideas: Great for Christmas, birthdays, anniversaries, Valentine?s Day, Teacher?s Day. Available Sets: 48 colors. Use: Ideal for school, office, journaling, crafts, and gift-giving. Unleash your imagination and bring your pages to life with bold, colorful strokes. These pens make the perfect gift for creatives of all ages!