1. Safe and Convenient: The acid and nontoxic ink of the color curve marker prevents smudging, fading, or leaking. Featuring a variety of welldesigned curve line types, its unique lace design effectively highlights important sections and creates beautiful patterns, making it both practical and essential for study and daily use. 2. Durable: Each linear colored pencil boasts a soft yet durable 0.4mm tip. Made from materials, our pen glides smoother than others, allowing you to effortlessly create elegant marking lines with a simple, fun touch. 3. Quick Drying Smooth: Designed for kids, the color curve pen features fastdrying ink that ensures clear, smooth writing. Simply place the pen under the text you wish to highlight and move the pen with ease. 4. DualTip: The dualtip marking design enables precise drawing at both ends of the curve. The Curve Highlighter Set combines multiple colors for versatile highlighting, making it an tool for both study and artistic projects.