Material:plastic Product Dimensions:19*3.2cm Plastic shape: Rectangle 1. Guide reading and cultivate interest: These reading highlights are simple and effective tools; The gray part blocks other sentences, and the transparent part helps readers track each sentence, which is convenient for readers to use in the reading process and cultivate their interest in reading 2. Good for learning: Designed to help students skip words, skip lines, so it's valuable for reinforcing visual tracking skills, blocking distractions, and helping teens stay focused while reading word by word 3. Meet your reading needs, a variety of color choices, stimulate children's interest in reading 4. Suitable size and durable quality: made of PVC material, durable waterproof, easy to clean 5. Application scope: Suitable for teachers to guide students to focus on reading through bookmarks, cultivate children's interest in reading, but also suitable for students to practice and review before and during the exam; Suitable for home, classroom, office and library use