Material: Plastic 100% New and High Quality Type: Set with Set Pen Head Diameter: 1.0mm Pen Length: 15cm MOST Authoritative Colors STE - Based on the analysis of a number of artists' work, our research and development team selected the 48 most common color schemes that are used the most, including 4 styles of ink: Metallic, Glitter, Neon, WaterChalk. This set allows you to think and express more freely. There will be no limits to your creativity. PROFESSIONAL LEVEL PERFECT WRITING EXPERIENCE - These colored pencil sets give you superior, long-lasting, vibrant colors that won't skip, smudge or fade. Use light glide ink to maintain smooth lines in a flowing, regular pattern! SAFE, EASY TO USE & PROFESSIONAL - We consider SAFETY a primary concern, especially where children are involved. Scientific ink formulations, Standard production process, Make the gel pens safe for you and children as they are both non-toxic and acid-free. The special colors are both permanent and water resistant, so you never have to worry about smudging your artwork! Each pen has great performance, you will never want to put it down. PERFECT FOR KIDS & ADULTS - Amazing gel pens for coloring books for adults, sketch, draw, paint, doodle, write and get creative in a fun and skillful way way. Greeting cards, Party invitations, Letters to friends and family, gel highlighter, arts and crafts, decoration, daycare, scrap booking, the uses are endless Package contains 12/16/18/24/36 / 48pcs Gel pens (various colors) Note: 1. Due to the light and monitor effect, colors may have slight difference. 2. Please allow some size error due to manual measurement. Thanks for your understanding! 3.1cm = 0.39''.