It is made of PP plastic and fiber, safe, waterproof. One set of products includes 4 pens in four colors. And it helps you emphasize important information when reading. Ideal for teachers, students, kids and office workers. Obvious imprint area is perfect to show your brand and logo. Ideal for teachers, students, kids and office workers. Ideal for giveaways at trade shows, school events, office supplies, and more. Made from abs material, measuring For Adult, this custom colorful ice cream highlighter set. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. Customization: Logo printing available with multiple packaging and color options. Product Highlights: Portable, durable, practical for daily use.